perf.rb

require "benchmark"
load 'old_callbacks.rb'
load '../lib/active_support/callbacks.rb'

GC.disable


module Definition
  def self.included(base)
    base.class_eval do
      define_callbacks :save

      10.times do
        set_callback :save, :before, :before_save1
        set_callback :save, :after, :after_save1
        set_callback :save, :around, :around_save1
      end

      def before_save1;nil; end
      def after_save1; nil; end
      def around_save1; nil; end

      def save
        run_callbacks :save do
          true
        end
      end

    end
  end
end

class OldClass
  include ActiveSupport::OldCallbacks
end

class NewClass
  include ActiveSupport::Callbacks
end

amount = 100
Benchmark.bmbm do |x|
  x.report "New set_callback" do
    amount.times do
      Class.new do
        include ActiveSupport::Callbacks
        include Definition
      end
    end
  end
  x.report "Old set_callback" do
    amount.times do
      Class.new do
        include ActiveSupport::OldCallbacks
        include Definition
      end
    end
  end
end

puts "*" * 120


class OldClass
  include ActiveSupport::OldCallbacks
  include Definition
end
old = OldClass.new

class NewClass
  include ActiveSupport::OldCallbacks
  include Definition
end
new = NewClass.new

amount = 10000
Benchmark.bmbm do |x|
  x.report "New run_callbacks" do
    amount.times do
      new.save
    end
  end
  x.report "Old run_callbacks" do
    amount.times do
      old.save
    end
  end
end
GC.enable