action-benchmarck around_filter

benchmark.rb

class BenchmarkFilter
 def before(controller)
  @timer = Time.now
    Rails.logger.debug do
      "- Action #{controller.action_name} started. |"
    end
 end

 def after(controller)
   elaped_time = Time.now - @timer
   Rails.logger.debug do
     "- Action #{controller.action_name} finished in %0.3sec" % elaped_time
   end
 end
end