Proxy object

object_proxy.rb

require 'benchmark'

class FooProxy
  attr_reader :foo

  def initialize(foo)
    @foo = foo
  end

  def bar
    foo.bar + baz
  end

  def baz
    "Baz"
  end

  def method_missing(*args)
    foo.public_send(*args)
  end
end

module FooDCI
  def bar
    baz + super
  end

  def baz
    "Baz"
  end
end

class Foo
  def bar
    "Bar"
  end

  def quux
    "Quux"
  end
end

Benchmark.bmbm do |x|
  iterations = 100_000
  x.report('Proxy')                { iterations.times { FooProxy.new(Foo.new).bar } }
  x.report('Proxy method_missing') { iterations.times { FooProxy.new(Foo.new).quux } }
  x.report('extend')               { iterations.times { Foo.new.extend(FooDCI).bar } }
  x.report('extend using quux')    { iterations.times { Foo.new.extend(FooDCI).quux } }
end

Results in Rubinius, JRuby and MRI 2.0:

➜  Code  rvm rbx do rbx benchmark_proxy_objects.rb
Rehearsal --------------------------------------------------------
Proxy                  1.354664   0.015928   1.370592 (  0.795843)
Proxy method_missing   0.378131   0.004161   0.382292 (  0.214804)
extend                 5.989122   0.143207   6.132329 (  4.607476)
extend using quux      3.389954   0.087350   3.477304 (  3.469409)
---------------------------------------------- total: 11.362517sec

                           user     system      total        real
Proxy                  0.178767   0.001212   0.179979 (  0.174005)
Proxy method_missing   0.069720   0.000682   0.070402 (  0.072454)
extend                 3.802052   0.089413   3.891465 (  3.960050)
extend using quux      3.109214   0.072562   3.181776 (  3.218772)
➜  Code  rvm jruby do jruby benchmark_proxy_objects.rb
Rehearsal --------------------------------------------------------
Proxy                  1.290000   0.020000   1.310000 (  0.779000)
Proxy method_missing   1.020000   0.050000   1.070000 (  0.643000)
extend                 3.900000   0.180000   4.080000 (  2.868000)
extend using quux      1.020000   0.040000   1.060000 (  0.903000)
----------------------------------------------- total: 7.520000sec

                           user     system      total        real
Proxy                  0.080000   0.000000   0.080000 (  0.068000)
Proxy method_missing   0.100000   0.000000   0.100000 (  0.087000)
extend                 0.900000   0.020000   0.920000 (  0.715000)
extend using quux      0.850000   0.020000   0.870000 (  0.586000)
➜  Code  rvm 2.0 do ruby benchmark_proxy_objects.rb
Rehearsal --------------------------------------------------------
Proxy                  0.130000   0.000000   0.130000 (  0.140826)
Proxy method_missing   0.130000   0.000000   0.130000 (  0.158820)
extend                 0.570000   0.040000   0.610000 (  0.602327)
extend using quux      0.440000   0.020000   0.460000 (  0.474000)
----------------------------------------------- total: 1.330000sec

                           user     system      total        real
Proxy                  0.140000   0.010000   0.150000 (  0.150230)
Proxy method_missing   0.130000   0.010000   0.140000 (  0.134410)
extend                 0.540000   0.020000   0.560000 (  0.582140)
extend using quux      0.440000   0.020000   0.460000 (  0.460955)