Browser caching is one of the least understood features of HTML5, but can make a dramatic improvement in your users’ experience of your website. It can speed up your site for both online and offline applications, desktop and mobile. The syntax for using local storage and offline caching is simple,...

Page caching is an efficient way to cache full content to be served by the front-end web server. Learn how to deal with pagination, expiration with sweepers, and user-specific content in this episode.

With HTTP response headers you can the cache in the user's browser and proxies. Etags, Last-Modified, Cache-Control and Rack::Cache are all covered here

Rails metal may have been removed in Rails 3, but it is possible to bypass the entire Rails stack through middleware as shown in this episode.

Here I describe each Rack middleware that is included in a Rails app which will give you a better understanding of what a request goes through behind the scenes before it hits your application.

Rails comes with three environments: development, test, and production, but it is easy to add your own. Here I show how to add a separate staging environment and how to start up Rails under this.

When was the last time JavaScript's "this" worked the way you thought it did? You have an object with a function, and you call "this" to get some data from the it only to find that the data isn't there because "this" isn't the object you thought it was! In this episode, we'll look at all function invocations and how they manipulate "this". We'll also see some common scenarios that trip people up, like passing an object's method as a callback.

Rack comes with many helpful utilities such as request and response objects, various middleware, and MockRequest for testing. Here I cover all of these while building a Rack app from scratch.

In Rails 3.1 subdomains are easier than ever to use. Here I show how to route a subdomain to a specific controller action, generate links, nest resources, and more.