# Instrumentation

class Controller

  def dispatch
    puts :dispatched
  end

end

class OtherController < Controller
end


module Timing

  def dispatch
    start = Time.now
    super
    elapsed = Time.now - start
    puts "#{self.class}#dispatch took #{elapsed}s"
  end

end


module TimingExtension

  def new(*args, &block)
    super.extend(Timing)
  end

end


Controller.extend(TimingExtension)

# Runtime

Controller.new.dispatch
OtherController.new.dispatch