rspec_optmization_2.rb

# delay the GC - usage as below

# Spec::Runner.configure do |config|
    .....
  
#   config.before(:each) do
#     begin_gc_deferment
#   end

#   config.after(:each) do
#     reconsider_gc_deferment
#   end

#end


DEFERRED_GC_THRESHOLD = (ENV['DEFER_GC'] || 1.0).to_f
@@last_gc_run = Time.now

def begin_gc_deferment
  GC.disable if DEFERRED_GC_THRESHOLD > 0
end
  
def reconsider_gc_deferment
  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