This gem extends RSpec to allow you to control how often GC cycles happen in order to trade increased memory usage for faster test runs. It's an encapsulated and reusable version of the code shown in this article:
For this to work, you need a Ruby that supports explicit control over the garbage collector, and RSpec 2.11.1 or higher.
Supported Rubies include MRI 1.9.2 and 1.9.3, and most likely Rubinius.
Unsupported Rubies are:
- MRI 1.8.x: No support for
On unsupported platforms, attempting to enable explicit GC control via this plugin will produce a warning and have no other effect.
Installation and Usage
Install the gem:
gem install rspec-gc-control
Or if you're using bundler, add this line to your
Gemfile and run
Once you have the gem installed, edit your
spec_helper.rb file to set
gc_every_n_examples to an appropriate value. You may want to play with this
value while watching memory consumption for the process to get a feeling for
how significant a tradeoff you're making in terms of increased memory usage.
RSpec.configure do |c| c.gc_every_n_examples = 10 end
You'll know it's working if you see output like the following at the end of your test run:
Finished in 6.45 seconds (including 7 forced GC cycle(s), totalling 0.67116 seconds) 71 examples, 0 failures, 1 pending