large rails app starts up 2.7x faster in 1.9.3dev than 1.9.2p290

rubyonrails-core
1

I've got a large Rails app we are porting from v2.3.12 to v3.0.10.

The app takes almost 60s to startup in development mode using Ruby 1.9.2-p290 on my 2.66 GHz Intel Core i7 MacBook Pro .

The app starts up about 2.7x faster on Ruby 1.9.3dev and the RSpec model tests run about 50% faster.

Will the 1.9.3 RC release have similar performance to 1.9.3dev?

Ruby 1.9.2-p290

   $ ruby -v; time bin/rails runner ""    ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin10.8.0]    real 0m50.333s    user 0m45.566s    sys 0m2.961s

   $ bin/rspec spec    Finished in 502.96 seconds    1792 examples, 492 failures, 53 pending

Ruby 1.9.3dev

   $ ruby -v; time bin/rails runner ""    ruby 1.9.3dev (2011-09-07 revision 33211) [x86_64-darwin10.8.0]    real 0m18.275s    user 0m15.750s    sys 0m1.587s

   $ bin/rspec spec/    Finished in 345.59 seconds    1792 examples, 492 failures, 53 pending

2

I've got a large Rails app we are porting from v2.3.12 to v3.0.10.

The app takes almost 60s to startup in development mode using Ruby 1.9.2-p290 on my 2.66 GHz Intel Core i7 MacBook Pro .

The app starts up about 2.7x faster on Ruby 1.9.3dev and the RSpec model tests run about 50% faster.

You should try with 1.9.2-head. I think this will be fixed in the next 1.9.2 patch release.

Will the 1.9.3 RC release have similar performance to 1.9.3dev?

Yes.

3

Startup times on ruby 1.9.2 head is about twice as fast:

  $ ruby -v; time bin/rails runner ""   ruby 1.9.2p312 (2011-08-11 revision 32926) [x86_64-darwin10.8.0]

  real 0m25.634s   user 0m23.242s   sys 0m2.057s