malre / appengine-go Goto Github PK

A simple benchmark (see attached) which puts and gets random binary data 
generates 10x allocations/garbage per cycle. This undermines my efforts to 
reduce garbage in the application proper.

Can a future release reduce internal garbage generation using internal memory 
recycling possibly with tunable parameters?


Benchmark_Cycle INFO     2014-03-09 10:54:21,137 devappserver2.py:675]
etc.
       1    1102063100 ns/op    11667160 B/op        372 allocs/op
ok      play.test/ae/allocplay  8.566s

I hope to build this from codes. :)

Thanks.

http://code.google.com/appengine/docs/go/datastore/overview.html

"Note: The first read of an entity group in an XG transaction may throw a 
exception if there is a conflict with other transactions accessing that entity 
group. This means that an XG transaction that performs only reads can fail with 
a concurrency exception."

Since Go does not have exceptions, the meaning of this is not clear.

http://code.google.com/appengine/docs/go/config/appconfig.html
says the default skip_files is
skip_files: |
 ^(.*/)?(
 (app\.yaml)|
 (app\.yml)|
 (index\.yaml)|
 (index\.yml)|
 (#.*#)|
 (.*~)|
 (.*\.go)|
 (.*/RCS/.*)|
 (\..*)|
 )$
or equivalently
skip_files:
- ^(.*/)?app\.yaml
- ^(.*/)?app\.yml
- ^(.*/)?index\.yaml
- ^(.*/)?index\.yml
- ^(.*/)?#.*#
- ^(.*/)?.*~
- ^(.*/)?.*\.go    <<<
- ^(.*/)?.*/RCS/.*
- ^(.*/)?\..*
- ^(.*/)?.*\.bak$

but that is clearly incorrect, since it would exclude all Go files
(see the like I marked with <<< line above).

More generally, there's no reason I'd ever want to remove from
the list of defaults, whatever it is.  I should be able to write

skip_files:
- ^mypattern$

and have it get added to the default list, whatever it is,
instead of having to copy a binary blob into my app.yaml file.