callback test.

callback.rb

require 'benchmark'

class Proc
  def slow_callback(callable, *args)
    self === Class.new do
      method_name = callable.to_sym
      define_method(method_name) { |&block| block.nil? ? true : block.call(*args) }
      define_method("#{method_name}?") { true }
      def method_missing(method_name, *args, &block) false; end
    end.new
  end
end

def slow_tweet(&block)
  block.slow_callback :failure, "FAIL"
end


ProcCallback = Struct.new(:called, :args) do
  def method_missing(name, *)
    name == :"#{called}?" || (name == called && block_given? && yield(*args))
  end
end

def tweet
  yield ProcCallback.new(:failure, "FAIL")
end

TIMES = 10_000

Benchmark.bmbm do |rep|
    rep.report("slow") do
      TIMES.times do
        slow_tweet do |cbk|
          cbk.success { }
          cbk.failure { |status| }
          cbk.success?
          cbk.failure?
        end
      end
    end
    rep.report("fast") do
      TIMES.times do
        tweet do |cbk|
          cbk.success { }
          cbk.failure { |status| }
          cbk.success?
          cbk.failure?
        end
      end
    end
end