Native operating system notifications about rails requests time

development.rb

# config/environments/development.rb
NOTIFIER = case RUBY_PLATFORM
when /linux/
  Bundler.require(:linux)
  Proc.new{|title, text| Libnotify.show(:body => text, :summary => title) }
when /darwin|mac/
  Bundler.require(:darwin)
  Proc.new{|title, text| Growl.notify(text, :title => title) }
else
  nil
end

ActiveSupport::Notifications.subscribe "process_action.action_controller" do |name, start, finish, id, payload|
  NOTIFIER.call(payload[:path], (finish - start).to_s) if NOTIFIER
end