wizcalil / openmbta2

rewrite of OpenMBTA

OpenMBTA2

A clean rewrite of OpenMBTA.

Setup

Assumes PostgreSQL and PostGIS extensions.

gem install pg

To populate the database, download the GTFS data CSV files into data/ and then run db/runall.sh

Then run

psql mbta < trips-today.sql

ssh [email protected] "pg_dump mbta2 -t nextbus_predictions | gzip -c " | gunzip -c | psql mbta2

Include -a if this is repeated

Before optimization of transit_routes on Dec 11 2013:

curl http://openmbta.org/routes/Bus real 0m2.076s user 0m0.006s sys 0m0.004s

After: real 0m0.884s user 0m0.006s sys 0m0.004s

Now to get number 1 trips:

real 0m3.434s user 0m0.010s sys 0m0.021s

[choi@sparta openmbta2]$ time ruby -Ilib lib/transit_trips.rb 'Green Line' 0 > out

real 0m3.406s user 0m2.969s sys 0m0.099s

zoe@li321-67:~/openmbta2$ ruby -Ilib lib/transit_trips.rb 'Green Line' 0 1>/dev/null select stops.stop_name, st.* from stop_times st inner join stops using(stop_id) where trip_id in (select trip_id from trips_today where route_coalesced_name = 'Green Line' and direction_id = 0) order by stop_id, arrival_time, stop_sequence calc_next_arrivals took 1.511933737 seconds make_grid took 3.588673105 seconds fix_grid_stop_ids took 0.000191765 seconds

Still slow:

ruby -Ilib lib/transit_trips.rb 'Green Line' 0 1>/dev/null select stops.stop_name, st.* from stop_times st inner join stops using(stop_id) where trip_id in (select trip_id from trips_today where route_coalesced_name = 'Green Line' and direction_id = 0) order by stop_id, arrival_time, stop_sequence calc_next_arrivals took 2.102558194 seconds make_grid took 3.095658068 seconds fix_grid_stop_ids took 0.000181157 seconds zoe@li321-67:~/openmbta2$ fg