As the Heroku Cedar stack has no Proxy in front of your Rails application any more static assets have to be delivered through your application. This is very inefficient and keeps your dynos or unicorn workers busy with serving your assets.
This blogpost shows how we use the Asset Pipeline, Compass and Amazon Cloudfront to serve all of our assets fast without sending any requests to our application directly.
Make your website super fast with Asset Pipeline, Sprites & Cloudfront
Railsonfire provides a continuous integration
and continuous deployment
platform for mobile and web applications.