gistfile1.txt

narnach@narnachbook ~/Development $ jruby speed.rb && ruby speed.rb
      user     system      total        real
define_method :one  0.107740   0.003617   0.111357 (  0.156973)
define_method :two  0.075185   0.001356   0.076541 (  0.098557)
def three           0.033372   0.000635   0.034007 (  0.042528)
      user     system      total        real
define_method :one  0.100000   0.000000   0.100000 (  0.130217)
define_method :two  0.100000   0.000000   0.100000 (  0.106536)
def three           0.050000   0.000000   0.050000 (  0.045840)

gistfile2.rb

#!/usr/bin/env ruby
#
# Methods defined using Ruby's define_method are slower to invoke than normally defined (eval-ed) methods.

require 'benchmark'
 
module Bench
  
 
  class One
    def self.add_slow_method(name,&block)
      define_method(name, &block)
    end
 
    def three
      3
    end
  end
end
 
Bench::One.add_slow_method('one') do
  1
end
 
Bench::One.add_slow_method('two') do
  2
end
 
n = 100_000
Benchmark.bm do |x|
  one = Bench::One.new
  x.report('define_method :one') do
    n.times {one.one}
  end
  x.report('define_method :two') do
    n.times {one.two}
  end
  x.report('def three') do
    n.times {one.three}
  end
end