Rake task to set GC params before running tests

gistfile2.txt

test-gc.rb

namespace :test do
  desc "Tune GC environment variables for test running"
  task :gc do
    # Requires REE or a Ruby patched to allow GC tuning
    # Credit to Darren Boyd at ZenDesk for the settings
    ENV['RUBY_HEAP_MIN_SLOTS']='500000'
    ENV['RUBY_HEAP_SLOTS_INCREMENT']='500000'
    ENV['RUBY_HEAP_SLOTS_GROWTH_FACTOR']='1'
    ENV['RUBY_GC_MALLOC_LIMIT']='100000000'
    ENV['RUBY_HEAP_FREE_MIN']='500000'
  end
end

# Hook the GC task before the common db prep prereq for all tests
Rake::Task['db:test:prepare'].enhance ['test:gc']