Pre define method

method-missing1.rb

require 'benchmark'

class A
  def method_missing name, *argv
    super unless name =~ /^test$/
    "hello world"
  end
end

class B
  def method_missing name, *argv
    super unless name =~ /^test$/

    instance_eval <<-METHOD
      def test
        "hello world"
      end
    METHOD

    test
  end
end

Benchmark.bm do |x|
  a = A.new
  b = B.new
  n = 50000

  x.report("method_missing") { n.times { a.test } }
  x.report("predefine method") { n.times { b.test } }

end