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🚴 Call stack profiler for Python. Shows you why your code is slow!

Home Page: https://pyinstrument.readthedocs.io/

License: BSD 3-Clause "New" or "Revised" License

Python 83.17% JavaScript 0.08% HTML 0.28% Shell 0.74% C 9.10% Dockerfile 0.52% Svelte 4.08% CSS 0.10% TypeScript 1.92%

python django profiler performance profile async

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pyinstrument's Issues

BUG: continuous sampling, multiple threads

great project, thank you.
this project works fine for short single-thread sessions, such as flask request
https://github.com/joerick/pyinstrument/blob/master/examples/flask_hello.py
this project does not work for long running applications with continuous sampling and with multiple threads, due to:

there is no provision for per-thread setprofile in profiler.py as required by threading.setprofile()
there will be a guaranteed out-memory due to unbounded queue in profiler.py
there is no support for multiple call stack roots
there is no easy way to extract session data without profiler.stop()

here is proof-of-concept implementation, which addresses some of these limitations:
https://gist.github.com/Andrei-Pozolotin/34a4a4f4e1cadf7893f9eecf695def2a

same stats bean is used for both sampling and rendering
sampling is activated for both main thread and every extra thread
samples are stored in bounded map
stats can be updated on demand from separate thread
rendering does not affect sampling or stats updaing

perhaps you could incorporate some of these ideas in the next release :-)

Add a way to screen out importlib noise

I often use pyinstrument to profile importing a module to figure out ways to speed up imports. On python2 this works very nice but on python3 pyinstrument will pick up frames from importlib, making it much harder to visually see what's happening in the pyinstrument profile. This is happening because importlib was rewritten from C to python in python3, so pyinstrument is able to capture stack frames from it in python3.

To make that concrete, here's the profile for "import sympy" generated under python2:

https://gist.github.com/ngoldbaum/3e2f5213b45a64f67167d0dbd5878ad5

and python3:

https://gist.github.com/ngoldbaum/fb46b92f22a65181aa7442e2af2f51c1

Add an entry-point

It would be nice to have a simple bin/pyinstrument (which also gets installed), so that you don't have to run python -m.

Timeline flag -t is not recognized as keyword argument

I'm trying to run pyinstrument with the -t flag but i'm getting this error:

pyinstrument -t -r html my_script.py

-packages\pyinstrument\__main__.py", line 177, in main renderer = renderer_class(**renderer_kwargs) TypeError: __init__() got an unexpected keyword argument 'timeline'

Can't see any data regarding any raised exception

Thanks for this lib.
I tried to raise an exception manually to see if I can check it in the trace result, it looks like it doesn't show anything regarding that exception. it just says an error occurred, am I missing something?
Here's the configuration I'm using:

@app.before_request
def before_request():
    g.profiler = Profiler()
    g.profiler.start()

@app.after_request
def after_request(response):
    if not hasattr(g, "profiler"):
        return response
    g.profiler.stop()
    output_html = g.profiler.output_html()
    return make_response(output_html)

-m args

Is the module mode -m supporting args?

+1 suggestion, support web ui with Stand-alone mode.

I really impressed about django mode.
But I usually coded with stand-alone. But I envy the web ui :)
So would you add web ui without django feature?

Better Unicode detection

My terminal supports Unicode, but pyinstrument doesn't use it.

SymPy's Unicode detection seems to be pretty robust (there are tons of users, and the only error reports about misusing Unicode when it isn't supported that I notice are from non-Terminals). It seems to be a combination of doing a unicodedata lookup and trying sys.stdout.encode. I also don't know if it makes sense to restrict unicode output to ttys. That generally only matters for colors, because the ANSI escape sequences might not be interpreted otherwise, and will just clutter the output.

The code's all BSD, so feel free to reuse it.

Cannot import Profile (DLL failed)

Getting following stacktrace running python2:

  File "C:\xplanbase\version\99.99.999\src\py\xpt\resourceful\api\portfolio\modelling.py", line 571, in __call__
    from pyinstrument import Profiler
  File "C:\Python27\lib\site-packages\pyinstrument\__init__.py", line 1, in <module>
    from pyinstrument.profiler import Profiler
  File "C:\Python27\lib\site-packages\pyinstrument\profiler.py", line 8, in <module>
    from pyinstrument_cext import setstatprofile
ImportError: DLL load failed: The specified module could not be found.

I have
pyinstrument==2.1.1
pyinstrument-cext==0.2.0

RuntimeError: maximum recursion depth exceeded

Since upgrading from rev. 69e0d9d and using the EventProfiler, we now often (i.e. mostly, but not every time) get a RuntimeError when tracing. Here's a stack trace.

Traceback (most recent call last):
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/registry.py", line 247, in __call__
    app_iter = self.application(environ, start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/middlewares.py", line 65, in __call__
    status, headers, app_iter, exc_info = _call_wsgi_application(self.app, environ)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/middlewares.py", line 20, in _call_wsgi_application
    app_iter = application(environ, _start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/middlewares.py", line 130, in __call__
    return self._stream_response(self.app(environ, start_response))
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tw/core/middleware.py", line 46, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tw/core/middleware.py", line 72, in wsgi_app
    resp = req.get_response(self.application)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tw/core/resource_injector.py", line 70, in _injector
    resp = req.get_response(app)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/transaction_manager.py", line 75, in __call__
    reraise(*exc_info)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/support/transaction_manager.py", line 51, in __call__
    response_data = self.app(environ, _start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/repoze.who-l10n-fix/repoze/who/middleware.py", line 87, in __call__
    app_iter = app(environ, wrapper.wrap_start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/beaker/middleware.py", line 73, in __call__
    return self.app(environ, start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/beaker/middleware.py", line 155, in __call__
    return self.wrap_app(environ, session_start_response)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/wsgiapp.py", line 102, in __call__
    response = self.wrapped_dispatch(controller, environ, context)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/wsgiapp.py", line 275, in dispatch
    return controller(environ, context)
  File "/Users/dagh/Documents/Jobb/onlive/OnLive/onlive/lib/base.py", line 48, in __call__
    return TGController.__call__(self, environ, context)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/lib/python2.7/site-packages/tg/controllers/dispatcher.py", line 122, in __call__
    response = self._perform_call(context)
  File "/Users/dagh/Documents/Jobb/onlive/OnLive/onlive/controllers/root.py", line 347, in _perform_call
    content = profiler.output_text()
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 147, in output_text
    return self.starting_frame(root=root).as_text(unicode=unicode)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 144, in starting_frame
    return self.first_interesting_frame()
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 131, in first_interesting_frame
    while len(frame.children) <= 1:
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 251, in children
    return sorted(self.children_dict.values(), key=attrgetter('time'), reverse=True)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 230, in time
    return sum(child.time for child in self.children) + self.self_time
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 251, in children
    return sorted(self.children_dict.values(), key=attrgetter('time'), reverse=True)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 230, in time
    return sum(child.time for child in self.children) + self.self_time
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 251, in children
    return sorted(self.children_dict.values(), key=attrgetter('time'), reverse=True)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/profiler.py", line 230, in time
    return sum(child.time for child in self.children) + self.self_time
  File "/Users/dagh/Documents/Jobb/onlive/tg2env/src/pyinstrument-master/pyinstrument/utils.py", line 37, in __get__
    value = self.func(obj)

…and so on.

Getting IOError

rahul@rahul-desktop { ~/pycharm-workspace/ceres_new }-> python -m pyinstrument ceres/sim/sim_definition.py
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, in run_module_as_main
"main", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in run_code
exec code in run_globals
File "/home/rahul/src/pyinstrument/pyinstrument/main.py", line 135, in
main()
File "/home/rahul/src/pyinstrument/pyinstrument/main.py", line 79, in main
exec(code, globs, None)
File "/home/rahul/src/pyinstrument/pyinstrument/main.py", line 25, in exec
exec("exec code in globs, locs")
File "", line 1, in
File "ceres/sim/sim_definition.py", line 48, in
main()
File "ceres/sim/sim_definition.py", line 31, in main
from aglyph.assembler import Assembler
File "/usr/local/lib/python2.7/dist-packages/aglyph/init.py", line 61, in
platform.platform()))
File "/usr/lib/python2.7/platform.py", line 1576, in platform
system,node,release,version,machine,processor = uname()
File "/usr/lib/python2.7/platform.py", line 1273, in uname
processor = _syscmd_uname('-p','')
File "/usr/lib/python2.7/platform.py", line 1029, in _syscmd_uname
output = string.strip(f.read())
IOError: [Errno 4] Interrupted system call
Alarm clock

Feature request: aggregating output

First of all, thank you for writing this profiler. The visuals are nice, the information is (almost) exactly what I need, and Django integration is easy (as is using it in any other project).

However, I'm trying to get one thing to work, which I haven't been able to yet: aggregating the output data. Currently, I get a pyinstrument html file for every request that is sent to Django, but I'm also interested in the aggregation of all the requests. Is that something that can be made and would you consider accepting a pull request for this?

One possible way I think is to support pstats output, as someone requested in this issue.

OSError: [Errno 36] File name too long

When using ProfilerMiddleware (pyinstrument 2.2.1) with Django (1.11.9), when profiling view related to an API endpoint that accepts very long GET querystring, I get the following error:

Traceback (most recent call last):
  File "/home/laurent/.pyenv/versions/my_app/lib/python3.6/site-packages/django/core/handlers/base.py", line 131, in get_response
    response = middleware_method(request, response)
   File "/home/laurent/.pyenv/versions/my_app/lib/python3.6/site-packages/pyinstrument/middleware.py", line 43, in process_response
    with open(file_path, 'w') as f:
OSError: [Errno 36] File name too long: 'profiles/2.279s _api_v1_translations_?word=comes&orig...[A_VERY_LONG_QUERYSTRING]'

I guess that the profile file name length could be truncated at some point in this module code.

error in pypy

I got this error when trying to profile a script using pyinstrument in pypy

ImportError: /home/xxxxxxx/.virtualenvs/pypy/site-packages/pyinstrument_cext.pypy3-60-x86_64-linux-gnu.so: undefined symbol: PyFrame_LocalsToFast

pyinstrument is very slow on django tests with docker

Dear,

I'm trying to use pyinstrument on docker with a django test setup. When I run the command like this ./manage.py test --keepdb services.rest.tests.test_views:AddCompanyTestCase.test_add_company -v 3 I get something like

240.152 <module>  manage.py:2
└─ 239.407 execute_from_command_line  django/core/management/__init__.py:378
      [23227 frames hidden]  django, django_nose, nose, unittest, ...
         48.646 patched  mock/mock.py:1314
         └─ 48.625 test_add_company  services/rest/tests/test_views.py:59
            ├─ 21.667 post  rest_framework/test.py:296
            │     [770 frames hidden]  rest_framework, django, reversion, se...
            │        21.055 inner  django/core/handlers/exception.py:31
            │        └─ 21.055 __call__  company/middleware.py:28
            │           └─ 21.036 inner  django/core/handlers/exception.py:31
            │              └─ 21.036 __call__  project/middleware.py:10
            │                 └─ 21.036 inner  django/core/handlers/exception.py:31
            │                       [106 frames hidden]  django, rest_framework, re, sre_compi...
            │                          20.995 dispatch  rest_framework/views.py:470
            │                          └─ 20.982 post  services/rest/views.py:813
            │                             └─ 20.851 save  rest_framework/serializers.py:171
            │                                └─ 20.851 create  services/rest/serializers.py:279
            │                                   ├─ 9.561 __get__  django/db/models/fields/related_descriptors.py:373
            │                                   │     [72 frames hidden]  django, raven, weakref
            │                                   ├─ 6.187 now  django/utils/timezone.py:218
            │                                   │     [2 frames hidden]  django
            │                                   └─ 4.289 [self]
            ├─ 19.563 reverse  django/urls/base.py:27
            │     [718 frames hidden]  django, re, sre_compile, sre_parse, e...
            │        4.988 import_module  importlib/__init__.py:109
            │        └─ 4.972 <module>  project/urls.py:1
            └─ 7.285 generate  project/generators.py:151
               └─ 7.281 _make_user  project/generators.py:64
                  ├─ 3.613 _make_username  project/generators.py:54
                  │  └─ 3.612 _make_wordlist  project/generators.py:47
                  │     └─ 3.612 <listcomp>  project/generators.py:49
                  │        └─ 3.602 [self]
                  └─ 3.368 _make_wordlist  project/generators.py:47
                     └─ 3.368 <listcomp>  project/generators.py:49
                        └─ 3.344 [self]
         9.312 load_source  imp.py:165
         └─ 9.291 <module>  services/rest/tests/test_views.py:2
            └─ 4.866 <module>  services/rest/serializers.py:1
               └─ 3.759 <module>  dictdiffer/__init__.py:11
                     [327 frames hidden]  dictdiffer, pkg_resources, re, posixp...
         40.742 import_module  importlib/__init__.py:109
         ├─ 28.759 <module>  shareholder/models.py:1
         │  ├─ 22.735 UserProfile  shareholder/models.py:1117
         │  │  └─ 22.726 __init__  django_languages/fields.py:7
         │  │        [11 frames hidden]  django_languages, django
         │  └─ 2.528 <module>  utils/pdf.py:1
         │     └─ 2.511 <module>  xhtml2pdf/pisa.py:16
         │           [1405 frames hidden]  xhtml2pdf, reportlab, re, sre_compile...
         47.142 import_module  importlib/__init__.py:109
         └─ 47.118 <module>  project/__init__.py:5
            ├─ 39.173 <module>  project/signals.py:4
            │  ├─ 25.066 <module>  registration/signals.py:1
            │  │     [26 frames hidden]  registration, django, importlib, path...
            │  │        25.032 import_module  importlib/__init__.py:109
            │  │        └─ 24.990 <module>  project/settings/dev.py:1
            │  │           └─ 24.953 <module>  project/settings/base.py:12
            │  │              ├─ 19.513 <module>  project/settings/tests.py:4
            │  │              │  └─ 19.512 stack  inspect.py:1511
            │  │              │        [278 frames hidden]  inspect, posixpath, genericpath, cele...
            │  │              └─ 4.018 <module>  raven/__init__.py:7
            │  │                    [951 frames hidden]  raven, requests, urllib3, re, sre_com...
            │  ├─ 8.870 <module>  services/slack.py:3
            │  │  └─ 8.728 register_task  celery/app/base.py:488
            │  │        [319 frames hidden]  celery, kombu, collections, logging, ...
            │  │           8.552 send  celery/utils/dispatch/signal.py:266
            │  │           └─ 8.550 setup_periodic_tasks  project/celery.py:32
            │  │              └─ 8.360 <module>  company/tasks.py:9
            │  │                 └─ 6.836 <module>  bs4/__init__.py:18
            │  │                       [3025 frames hidden]  bs4, soupsieve, re, sre_compile, sre_...
            │  └─ 5.143 <module>  django/contrib/auth/__init__.py:1
            │        [2516 frames hidden]  django, pathlib, re, sre_compile, sre...
            └─ 7.762 <module>  project/celery.py:6
               └─ 6.292 <module>  celery/schedules.py:2
                     [1914 frames hidden]  celery, kombu, importlib_metadata, re...

where even now takes 6s. Without pyinstrument this test takes about ~30s and I need to find out why...

What other information do you need from my side?

Literally just want to thank you.

What an incredible package. You clearly put a lot of care and forethought into the design, particularly w.r.t. the plug-ability with Django (which, by the way, is a HUGE lifesaver when dealing with unwieldy ORM issues!) and presentation of statistical profiling metrics. Just, wow.

A round of applause to @joerick !

Useful frames hidden

I am trying to profile some SymPy code. However, the output hides all the useful information in "hidden frames".

# test.py
from sympy import symbols, Min
x = symbols('x:50')
Min(*x)

  _     ._   __/__   _ _  _  _ _/_   Recorded: 23:10:12  Samples:  2312
 /_//_/// /_\ / //_// / //_'/ //     Duration: 3.560     CPU time: 3.540
/   _/                      v3.0.1

Program: test.py

3.559 <module>  test.py:1
├─ 3.062 __new__  sympy/functions/elementary/miscellaneous.py:341
│     [1798 frames hidden]  sympy, random
└─ 0.497 <module>  sympy/__init__.py:12
      [751 frames hidden]  sympy, inspect, enum, re, collections...

To view this report with different options, run:
    pyinstrument --load-prev 2019-03-14T23-10-12 [options]

Running modules

I'd like to trace a program requiring execution with python -m. How should I do it? I know Python 3.7 has introduced support for it in some of the script executing modules.

Write some tests

No open source project should be without tests. We need to get a test suite in here, but I'm not personally very experienced with writing tests, and I'm unsure how to test pyinstrument!

My main sticking point is that the output isn't deterministic, so we can't check that the output is equal to what we expect.

Does anybody have any ideas about how to test this?

Feature Request: pstats output

One thing that would be very useful is to be able to produce output from pyinstrument in a Python pstats file. That would allow it to, for example, be passed to gprof2dot to produce a call-graph tree. It looks like the file format is pretty simple -- some data in a dictionary gets dumped using marshal.dump (see here).

redis-py while profiling results in ConnectionError

With python 3.6.3, redis 2.10.6 and the pyinstrument currently on pypi, I get a ConnectionError when connecting to redis while the profiler is running. Reproducer:

import redis
from pyinstrument import Profiler

_redis = redis.StrictRedis(...)
_redis.get('foo')
print('Works')

profiler = Profiler()
profiler.start()
_redis = redis.StrictRedis(...)
_redis.get('foo')
print('Fails')

Traceback

Traceback (most recent call last):
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 484, in connect
    sock = self._connect()
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 541, in _connect
    raise err
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 529, in _connect
    sock.connect(socket_address)
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/client.py", line 667, in execute_command
    connection.send_command(*args)
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 610, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 585, in send_packed_command
    self.connect()
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 489, in connect
    raise ConnectionError(self._error_message(e))
redis.exceptions.ConnectionError: Error 22 connecting to 35.195.188.81:6379. Invalid argument.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 484, in connect
    sock = self._connect()
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 541, in _connect
    raise err
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 529, in _connect
    sock.connect(socket_address)
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "test.py", line 22, in <module>
    _redis.get('foo')
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/client.py", line 976, in get
    return self.execute_command('GET', name)
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/client.py", line 673, in execute_command
    connection.send_command(*args)
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 610, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 585, in send_packed_command
    self.connect()
  File "/Users/matt/us-research/env/lib/python3.6/site-packages/redis/connection.py", line 489, in connect

Re-introduce support for the EventProfiler

Hey Joe,

Thank you for this great little library. I and my colleague find it extremely useful.

The other day, I added configurable support for profiling of all requests on our TurboGears 2-based Web app using your pyinstrument.Profiler. However, when I redployed my development environment, the profiling feature broke. After some investigation I realize it's because we used the EventProfiler, and the new StatProfiler doesn't work (always raising the NotMainThreadError).

I'm stuck using your 69e0d9d commit, and therefore wonder if you could consider re-introducing the EventProfiler?

HTML navigation with arrow keys

Is it possible to allow navigation of the html pages with the arrow keys, with up and down selecting up and down and left and right closing and opening the items?

Profiling with multiprocessing

Is there any support for profiling multiple processes? Right now profiling code that uses multiprocessing gives me eg.

40.909 update_basketball_events_db  db_updater/events.py:38
└─ 40.855 map  multiprocessing/pool.py:261
   └─ 40.855 get  multiprocessing/pool.py:637
      └─ 40.855 wait  multiprocessing/pool.py:634
         └─ 40.855 wait  threading.py:533
            └─ 40.855 wait  threading.py:263

Generated html file is huge

I was running pyinstrument and I got a huge html file (214 MB). I have uploaded the file at https://gist.github.com/asmeurer/a31ee881be8e3d77938b. There needs to be some way to limit the output. I think the way that makes the most sense is to not show nodes that take less than a given amount of time (say 1% of the total time).

Profiling Cython functions

I noticed that even when using the @cython.profile decorator, Cython functions don't show up in the call stack. Is there any way to add support for Cython?

Python 3 support

Any plans for Python 3 support?

Renderer doesn't work.

tested on windows10, python3.6.6 pyinstrument2.30

"--html, -r json, -r html " doesn't work.

And， --output file doesn't work either.

Tarball release on PyPI?

Hi, would it be possible to add tarball releases on PyPI? I'm trying to write a package for pyinstrument for the Spack package manager, but the GitHub tarball requires npm to install from source, and I'm having a hell of a time getting npm installed using Python 3. Could you add a tarball on PyPI that doesn't require npm to install from source?

@tgamblin

Error running from master

I get this error trying to run pyinstrument from master

Traceback (most recent call last):
  File "/Users/aaronmeurer/anaconda3/lib/python3.5/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/Users/aaronmeurer/anaconda3/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/aaronmeurer/Documents/pyinstrument/pyinstrument/__main__.py", line 274, in <module>
    main()
  File "/Users/aaronmeurer/Documents/pyinstrument/pyinstrument/__main__.py", line 160, in main
    f.write(renderer.render(session))
  File "/Users/aaronmeurer/Documents/pyinstrument/pyinstrument/renderers/html.py", line 11, in render
    with io.open(os.path.join(resources_dir, 'app.js'), encoding='utf-8') as f:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/aaronmeurer/Documents/pyinstrument/pyinstrument/renderers/html_resources/app.js'

Is there a file that isn't checked in, or do I need to do some kind of build?

Thread support in signal mode

Your README says

On Mac/Linux/Unix, pyinstrument can run in 'signal' mode. [...] However, this can only profile the main thread.

You could instead sample the call stacks of all active threads by using sys._current_frames(), which returns a dict mapping thread IDs to frame objects.

Feature Request: JSON Renderer

Hey, I've seen on pervious discussion an idea mentioned to implement a JSON renderer.
How hard should it be?
How familiar should I be with the code base and underlying concepts to implement it?
Is it a desired feature in the library?
Awesome work

AssertionError when use flask+gunicorn+gevent

Hai ! I encount this AssertionError when I use pyinstrument to hook my flask app like the examples/flask_hello.py said.

AssertionError: Please raise an issue at http://github.com/pyinstrument/issues and let me know how you caused this error!

This error doesn't happen every time I send request. Instead, several consecutive requests occur once. Then Nginx will return 500 status code.

Here is the full trackback stack from gunicorn error.log file:

[2020-01-22 04:34:28 +0800] [26251] [ERROR] Error handling request /v2/services/xxxx/xxxx/get?key1=value1&key2=value2&key3=value3&__profile__
Traceback (most recent call last):
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 55, in handle
    self.handle_request(listener_name, req, client, addr)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/gunicorn/workers/ggevent.py", line 143, in handle_request
    super().handle_request(listener_name, req, sock, addr)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/gunicorn/workers/base_async.py", line 106, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 2463, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/werkzeug/middleware/proxy_fix.py", line 228, in __call__
    return self.app(environ, start_response)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 2449, in wsgi_app
    response = self.handle_exception(e)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 1866, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 1952, in full_dispatch_request
    return self.finalize_request(rv)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 1969, in finalize_request
    response = self.process_response(response)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/flask/app.py", line 2266, in process_response
    response = handler(response)
  File "/home/pyserver/www/wsgi.py", line 44, in after_request
    output_html = g.profiler.output_html()
  File "</home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/vendor/decorator.py:decorator-gen-9>", line 2, in output_html
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/util.py", line 37, in caller
    return func(*args, **kwargs)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/profiler.py", line 101, in output_html
    return renderers.HTMLRenderer().render(self.last_session)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/renderers/html.py", line 23, in render
    session_json = self.render_json(session)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/renderers/html.py", line 69, in render_json
    return json_renderer.render(session)
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/renderers/jsonrenderer.py", line 36, in render
    frame = self.preprocess(session.root_frame())
  File "/home/pyserver/.pyenv/versions/3.6.6/envs/envpy36/lib/python3.6/site-packages/pyinstrument/session.py", line 77, in root_frame
    assert root_frame is None, ASSERTION_MESSAGE
AssertionError: Please raise an issue at http://github.com/pyinstrument/issues and let me know how you caused this error!

Here is my gunicorn.conf.py file

import os
import multiprocessing

chdir = WSGI_APP_ROOT

daemon = True
accesslog = os.path.join(LOG_DIR, "access.log")
errorlog  = os.path.join(LOG_DIR, "error.log")

pidfile = os.path.join(RUN_DIR, "gunicorn.pid")

user  = 33  # www-data
group = 33  # www-data

bind = [ "unix:" + os.path.join(RUN_DIR, "gunicorn.sock") ]

workers = multiprocessing.cpu_count() * 2 + 1
worker_class = "gevent"
worker_connections = 1024
threads = multiprocessing.cpu_count() * 3 

timeout = 15
graceful_timeout = 15
keepalive = 5

Here is my wsgi.py module

PYINSTRUMENT_HOOK          = True
PYINSTRUMENT_PROFILE_FIELD = "__profile__"

from gevent.monkey import patch_all
patch_all()

import os
from werkzeug.middleware.proxy_fix import ProxyFix
from v2.app import create_app

app = create_app("development")

if PYINSTRUMENT_HOOK:

    from flask import g, request, make_response
    from pyinstrument import Profiler

    @app.before_request
    def before_request():
        if PYINSTRUMENT_PROFILE_FIELD in request.args:
            g.profiler = Profiler()
            g.profiler.start()

    @app.after_request
    def after_request(response):
        if not hasattr(g, "profiler"):
            return response
        g.profiler.stop()
        output_html = g.profiler.output_html()
        return make_response(output_html)

app.wsgi_app = ProxyFix(app.wsgi_app, x_for=1)

The requirements.txt

Flask==1.1.1
Werkzeug==0.15.4 
greenlet==0.4.15
gevent==1.4.0
gunicorn==20.0.4
pyinstrument==3.1.0

The pyenv version

Python 3.6.6

--html producing terminal output

I am using

python -m pyinstrument --html -o test.html test.py

test.html contains the terminal formatted output, not the HTML.

UnicodeEncodeError when writing html

- - - [2019-11-13 05:17:27,813] "- - -" - [ERROR:django.request:256] Internal Server Error: /api/v1/logout
Traceback (most recent call last):
  File "/Users/anand/.local/share/virtualenvs/avilpage-pc50wcPX/lib/python2.7/site-packages/django/core/handlers/base.py", line 223, in get_response
    response = middleware_method(request, response)
  File "/Users/anand/.local/share/virtualenvs/avilpage-pc50wcPX/lib/python2.7/site-packages/pyinstrument/middleware.py", line 53, in process_response
    f.write(output_html)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 87794: ordinal not in range(128)
[13/Nov/2019 05:17:27] "POST /api/v1/logout HTTP/1.1" 500 95880

When adding middleware to django and writing html to profiles directory, it is failing with unicode encode error.

Provide a warning when time is likely spent in another thread

pyinstrument only records one thread at a time. However, due to the GIL, the performance of one thread could be affected by a different active thread in the same program.

Python can now give CPU time per-thread:

This could be compared with the program CPU time - if the current thread is less than 80% of the program's CPU time, it's likely that that other thread was slowing the profiled one down - this should be communicated in pyinstrument's output.

It would be even better if we could track the time spent inside the GIL (and even subtract it), but I'm not sure how to do that!

PyPI

It would be great if you could upload this to PyPI.

Add a way to ignore modules in the output

It would be nice if there were a way to only show contributions from certain modules. Right now I'm getting a lot of noise in my output from nose since I'm profiling a set of unit tests. It would be nice if I could exclude traces that include nose and just see the timings for my code.

Perhaps this is me not understanding the purpose of the library - feel free to close if you don't agree that this is within the project scope.

feature request: dump and analyze

It is cool to print beautiful callstacks after we stop the profiler and call output_text/html. However, this only gives users one angle to look at data: full-depth (the whole callstack is printed) and caller-based (caller are parents, and callee functions are children on the tree).

In many cases, it is useful if we can analyze the same profiling data from different angles. For example:

(1) callee-based: for development in a big software framework, new functions are part of the framework, and are often at the bottom or at most in the middle of the call stack. If the profiler can only print callstack as caller-based, it would take a lot of time to find the data people care about.

(2) reduced callstack depth:if I only want a big picture, I may want to filter the results with an option like "depth=1" or "depth=2" etc, to print only functions at the top or bottom of the callstack. This option should work in either caller-based or callee-based
stack. I know in web UI, the stack tree and fold and expand so it doesn't have to be changed, but the text mode doesn't have this option, and if we want to generate reports, we need to process text output.

In order to do this, we might want to separate result display into two steps. Step1: dump the data. Step 2: process the data.

Step 1 conceptually works as it does now: when profiler is stopped, it "dump" profiling data into a user specified or default file name.

Step 2: this requires a new tool that can understand the dump and display callstacks as a user desires.

So the point is to give users more angles to analyze without having to profile the same application multiple times.

Any thoughts?

License?

What is the license of this code? I couldn't find it anywhere.

Feature Request: Attach & detach to a running process

I'd like to be able to run a long time process (for instance a server), attach to it, trace the calls, detach from it and get the frame timings.

Version 2.0.1 can't import the top level package.

See:

moorepants@garuda:pyinstrument((v2.0.1))$ python -c "import pyinstrument"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/moorepants/src/pyinstrument/pyinstrument/__init__.py", line 1, in <module>
    from pyinstrument.profiler import Profiler
  File "/home/moorepants/src/pyinstrument/pyinstrument/profiler.py", line 8, in <module>
    from pyinstrument_cext import setstatprofile
ImportError: No module named 'pyinstrument_cext'

Note that this was picked up on the conda-forge build: conda-forge/pyinstrument-feedstock#6

Update README to reflect signal=False usage

This allows environments that can't use signal to use pyinstrument (Windows, secondary thread)

Failed output_html on Flask app

get the error:

Please raise an issue at http://github.com/pyinstrument/issues and let me know how you caused this error!

my app.py:

from flask import Flask, g, make_response, request 
from pyinstrument import Profiler

....
@app.before_request                                                                                                                                                                                                                                                             
def before_request():                                                                                                                                                                                                                                                           
    request.start_time = time.time() // old naive timings wanting to replace with pyinstrument
    if "profile" in request.args:                                                                                                                                                                                                                                               
        g.profiler = Profiler()                                                                                                                                                                                                                                                 
        g.profiler.start()                                                                                                                                                                                                                                                      
                                                                                                                                                                                                                                                                                
@app.after_request                                                                                                                                                                                                                                                              
def after_request(response):                                                                                                                                                                                                                                                    
    request_latency = time.time() - request.start_time                                                                                                                                                                                                                          
    latency_microseconds = request_latency / 1000000                                                                                                                                                                                                                            
                                                                                                                                                                                                                                                                          
    response.headers['X-Container'] = settings.HOSTNAME                                                                                                                                                                                   
                                                                                                                                                                                                                                                                                
    if not hasattr(g, "profiler"):                                                                                                                                                                                                                                              
        return response                                                                                                                                                                                                                                                                              
                                                                                                                                                                                                                                                                                
    profiler_session = g.profiler.stop()                                                                                                                                                                                                                                        
    try:                                                                                                                                                                                                                                                                        
        output_html = g.profiler.output_html()                                                                                                                                                                                                                                  
    except Exception as e:                                                                                                                                                                                                                                                      
        print('error')                                                                                                                                                                                                                                                          
        print(e)                                                                                                                                                                                                                                                                
    return make_response(output_html)

Let me know what other additional information you need!

Continuous segfaults

I am trying to use pyinstrument in a Django project and it's segfaulting in almost every page. In this case, every page is the html itself plus some API requests that are done from the page JavaScript to the same Django server.
I have managed to solve it adding a filter that allows me to profile only one of the requests. The code for the filter is in this commit: jredrejo@004a66c

The project I am profiling is https://github.com/learningequality/kolibri . I added the middleware setup at
https://github.com/learningequality/kolibri/blob/develop/kolibri/deployment/default/settings/base.py

The problem happens whenever PYINSTRUMENT_PROFILE_DIR is set, I need it to profile the api requests.

Python compiled extensions sampling with the gdb 7+ Python extensions

gdb makes it possible to get the backtrace of C programs with the bt command and since version 7, when the program is a Python program it's also possible to get the Python level call stack using the py-bt command, for instance see this post:

http://misspent.wordpress.com/2012/03/24/debugging-cc-and-cpython-using-gdb-7s-new-python-extension-support/

So it might be possible to use that to collect mixed Python + C call stacks every 10ms or so to profile inner call to C compiled extensions (e.g. Cython code) in a Python program when gdb is available on the system.

Also Pyrasite is using gdb to inject arbitrary Python code in a running Python process so it might also be possible to use a similar approach to attach the pyinstrument profiler to an existing running Python process.

Add documentation for PYINSTRUMENT_PROFILE_DIR and PYINSTRUMENT_USE_SIGNAL

Maximum recursion depth with python 3.4

Hi,

Thanks for a great tool! I get a maximum recursion depth when running pyinstrument with python 3.4.3, but it completes fine with 2.7.9. Full error log below.

I have these versions for both python 3.4.3 and 2.7.9

pyinstrument (2.0.0)
pyinstrument-cext (0.1.2)

Traceback (most recent call last):
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/__main__.py", line 138, in <module>
    main()
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/__main__.py", line 101, in main
    f.write(profiler.output(renderer=renderer, **renderer_kwargs))
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/profiler.py", line 93, in output
    return renderer.render(self.starting_frame(root=root))
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/profiler.py", line 82, in starting_frame
    return self.first_interesting_frame()
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/profiler.py", line 69, in first_interesting_frame
    while len(frame.children) <= 1:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 74, in time
    for child in self.children:
  File "/Users/kxs624/.pyenv/versions/3.4.3/lib/python3.4/site-packages/pyinstrument/frame.py", line 138, in children
    self._children = sorted(unsorted_children, key=methodcaller('time'), reverse=True)
RuntimeError: maximum recursion depth exceeded while calling a Python object

How can i use it in windows?

Allow using `Profiler` as context manager

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