gistfile1.rb

require 'casting'
require 'benchmark'
require 'delegate'

module Greeter
  def hello
    %{hello from #{self}}
  end
end

class Person
end

class InheritedPerson < Person
  def hello
    %{hello from #{self}}
  end
end

class MixinPerson
  include Greeter
end

class CastingPerson
  include Casting::Client
end

class CastingAllPerson
  include Casting::Client
  delegate_missing_methods
end

class DelegatorPerson < SimpleDelegator
  def hello
    %{hello from #{self}}
  end
end

class WrapperPerson
  def initialize(person)
    @person = person
  end

  def hello
    %{hello from #{@person}}
  end
end

n = 100000
Benchmark.bm do |x|
  x.report("inherited") { n.times {
    person0 = InheritedPerson.new
    person0.hello
  }}
  x.report("mixin") { n.times {
    person1 = MixinPerson.new
    person1.hello
  }}
  x.report("my wrapper") { n.times {
    person2 = WrapperPerson.new(Person.new)
    person2.hello
  }}

  x.report("simple delegator") { n.times {
    person3 = DelegatorPerson.new(Person.new)
    person3.hello
  }}
  x.report("dynamic extend") { n.times {
    person4 = Person.new
    person4.extend(Greeter)
    person4.hello
  }}
  #x.report("casting") { n.times {
  #  CastingPerson.new.delegate(:hello, Greeter)
  #}}
  #x.report("casting all") { n.times {
  #  person6 = CastingAllPerson.new
  #  person6.cast_as(Greeter)
  #  person6.hello
  #}}
end