dci_benchmark.rb

require 'rubygems'     
require 'benchmark/ips'     
 
class ExampleClass     
  def foo; 42; end     
end     
 
non_dci_object = ExampleClass.new    
 
module ExampleMixin     
  def foo; 43; end     
end     
 
dci_object = Object.new    
dci_object.extend(ExampleMixin)    

p RUBY_DESCRIPTION     
 
Benchmark.ips do |bm|    
  bm.report("without dci") do     
    non_dci_object.foo    
  end     

  bm.report("with dci") do     
    dci_object.foo    
  end     
end     

results.txt

"ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux]"
Calculating -------------------------------------
         without dci    129417 i/100ms
            with dci    130700 i/100ms
-------------------------------------------------
         without dci  7413656.2 (±1.0%) i/s -   37142679 in   5.010532s
            with dci  7390905.0 (±1.3%) i/s -   36988100 in   5.005453s