CODEWITHSUNDEEP
ruby-on-railsrubytestingrspec
TheDelChop
TheDelChop

Reputation: 7998

RSpec suite performance difference

I've got an interesting problem that's causing myself and my team a lot of headaches when it comes to running our spec suite.

Our spec suite is broken up into the following sub-folders, and next to them is their total execution time to completion:

rspec spec/acceptance    311.67s
rspec spec/controllers   18.97s
rspec spec/decorators    4.39s
rspec spec/helpers       9.45s
rspec spec/lib           16.88s
rspec spec/mailers       5.27s
rspec spec/models        121.05s
rspec spec/presenters    0.03s
rspec spec/workers       19.3s

Total run time: 8m 27s

Which certainly could be improved, but all in all is pretty managable.

However, if, I run rspec spec and run the entire suite at once, the total time to complete is 27m 11s!

So, obviously something we are doing is dramatically affecting the performance of the entire suite when run at once. I'm hoping that I can get some pointers as to where I can begin to try to troubleshoot this problem.

If it helps, I've posted my spec_helper.rb file here

Thanks in advance,

Joe

Upvotes: 2

Views: 353

Answers (2)

lobati
lobati

Reputation: 10195

At a guess, I'd say your integration specs are setting DatabaseCleaner to :truncation and it's not getting switched back to :transaction for the other specs. I have a sample spec_helper that navigates the situation here. There are also a couple methods provided that help you dig in and figure out which strategy is being used at any given time. Here it is for your convenience:

def cleaner_strategy
  active_record_cleaner.instance_variable_get(:@strategy).class
end

def active_record_cleaner
  DatabaseCleaner.instance_variable_get(:@cleaners)[[:active_record, {}]]
end

Side note: we use a filter for our integration specs since they are so slow. We disable them by default in our local env, and then let CI run them.

config.filter_run_excluding :slow unless ENV['SLOW']

Then you can run them individually with:

$ SLOW=true rspec spec/features/some_awesome_feature_spec.rb

Upvotes: 1

adarsh
adarsh

Reputation: 396

What does profiling tell you?

Run rspec spec --profile or add --profile to your ~/.rspec file.

On completion of your tests, it will report the 10 slowest tests.

Upvotes: 0

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