Compress Your HTML Responses - Andy Croll

There are multiple aspects to the performance of typical Rails applications: database queries, view render time, fragment caching, and more. There are also considerations for the front-end: image compression, Javascript, and CSS size.We often use CDNs, compression, and minification for the assets (images, CSS, and JS) our applications use. However, many hosts (including Heroku) do not compress the HTML that is generated by our applications by default.