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Deferring garbage collection cuts the time to run the test suite down (

…#547).

Just over a third of the time it used to take.

    # before
    Finished in 178.55 seconds
    1148 examples, 0 failures

    #after
    Finished in 66.23 seconds
    1148 examples, 0 failures
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1 parent 8f1e885 commit 2787d87138957e3c7cf82ba162b9ededb143955d @justinfrench committed Jun 1, 2011
Showing with 31 additions and 0 deletions.
  1. +10 −0 spec/spec_helper.rb
  2. +21 −0 spec/support/deferred_garbage_collection.rb
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10 spec/spec_helper.rb
@@ -349,3 +349,13 @@ def with_config(config_method_name, value, &block)
end
::ActiveSupport::Deprecation.silenced = false
+
+
+Rspec.configure do |config|
+ config.before(:all) do
+ DeferredGarbageCollection.start
+ end
+ config.after(:all) do
+ DeferredGarbageCollection.reconsider
+ end
+end
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21 spec/support/deferred_garbage_collection.rb
@@ -0,0 +1,21 @@
+# Taken from http://makandra.com/notes/950-speed-up-rspec-by-deferring-garbage-collection
+class DeferredGarbageCollection
+
+ DEFERRED_GC_THRESHOLD = (ENV['DEFER_GC'] || 10.0).to_f
+
+ @@last_gc_run = Time.now
+
+ def self.start
+ GC.disable if DEFERRED_GC_THRESHOLD > 0
+ end
+
+ def self.reconsider
+ if DEFERRED_GC_THRESHOLD > 0 && Time.now - @@last_gc_run >= DEFERRED_GC_THRESHOLD
+ GC.enable
+ GC.start
+ GC.disable
+ @@last_gc_run = Time.now
+ end
+ end
+
+end

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