CODEWITHSUNDEEP
ruby-on-railsrubyrspecprofilinggoogle-perftools
Dmytrii Nagirniak
Dmytrii Nagirniak

Reputation: 24108

How to profile RSpec with perftools and bundler?

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?

Upvotes: 16

Views: 2147

Answers (1)

katzmopolitan
katzmopolitan

Reputation: 1381

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

  1. 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

  2. Run your rspec

  3. Run pprof to get your numbers

    pprof.rb --text  /tmp/rspec_profile

Upvotes: 16

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