Rails 2.3 shipped with Rack support and contains a set of middleware libraries which can be used to customize and optimize your Rails application. In this screencast we go over the basics of Rack & Rack Middleware, walk through the Rails Rack stack, and show how to optimize certain actions in your Ra...

Rails Metal is a way to bypass the standard Rails request process for a performance boost. In this episode you will learn how to shave off a few milliseconds using Metal.