DCI Benchmarks - http://mikepackdev.com/blog_posts/22-benchmarking-dci-in-ruby

decorate_bm.rb

require 'benchmark'
require 'delegate'

class DecorateUser
end

class RunnerDecorator < DelegateClass(DecorateUser)
  def initialize(user)
    super user
  end

  def run
    Math.tan(Math::PI / 4)
  end
end

Benchmark.bm do |bench|
  3.times do
    bench.report('decorate') do
      1000000.times do
        user = RunnerDecorator.new(DecorateUser.new)
        user.run
      end
    end
  end
end

extend_bm.rb

require 'benchmark'

class ExtendUser
end

module Runner
  def run
    Math.tan(Math::PI / 4)
  end
end

Benchmark.bm do |bench|
  3.times do
    bench.report('extend') do
      1000000.times do
        user = ExtendUser.new
        user.extend Runner
        user.run
      end
    end
  end
end

include_bm.rb

require 'benchmark'

module Runner
  def run
    Math.tan(Math::PI / 4)
  end
end

class IncludeUser
  include Runner
end

Benchmark.bm do |bench|
  3.times do
    bench.report('include') do
      1000000.times do
        user = IncludeUser.new
        user.run
      end
    end
  end
end