![RailsCasts show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/031/920/small/railscasts.jpg)
Summary: Rails 3 comes with instrument support through the ActiveSupport::Notifications class. Call "subscribe" to listen to notifications, and "instrument" to send them.
Summary: Rails 3 comes with instrument support through the ActiveSupport::Notifications class. Call "subscribe" to listen to notifications, and "instrument" to send them.