How to profile RSpec with perftools and bundler?

Question

I need to profile the test suite that I usually run with bundle exec rspec spec/ and produce the GIF image.

What is the command to run the perftools.rb so that it works correctly with bundler?

katzmopolitan · Accepted Answer · 2012-12-14T05:07:15.453

16

I too had to dig around to get this. Here is what I did

Put this in spec_helper.rb:

config.before :suite do
  PerfTools::CpuProfiler.start("/tmp/rspec_profile")
end

config.after :suite do
  PerfTools::CpuProfiler.stop
end

edited Dec 14 '12 at 05:07

answered Dec 14 '12 at 04:50

katzmopolitan

you can also do --gif but it would require you to have graphviz installed. run pprof.rb to get all available options – katzmopolitan Dec 14 '12 at 05:06
1

also given the original requirement of bundler... you may have to bundle exec pprof.rb --text /tmp/rspec_profile – engineerDave May 07 '13 at 23:46

1 Answers1