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