Extend vs Include in Metaclass

gistfile1.rb

require 'ruby-prof'

module M
  def foo
    puts "M#foo"
  end
end

class C
end


n = 150000


t1 = Time.now
n.times do
  c = C.new
  c.extend M
end
t2 = Time.now
extend_time = t2 - t1
puts extend_time


class C2
end

RubyProf.start

t1 = Time.now
n.times do
  c = C2.new
  mc = c.instance_eval { class << self; self; end }
  mc.instance_eval { include M }
end

result = RubyProf.stop

printer = RubyProf::GraphHtmlPrinter.new(result)
open('metaclass2.html', 'w'){ |io| printer.print io, :min_percent => 0 }

t2 = Time.now
meta_include_time = t2 - t1
puts meta_include_time


puts meta_include_time / extend_time