CloudFlare

CloudFlare
DreamHost is a "Optimized Hosting Partner" of CloudFlare.

Railgun
According to CloudFlare, Railgun is a similar technology to "Edge Side Includes" Read Cloudflare blog and is used to optimize and cache static HTML. Benefits of Railgun are:
 * Web optimization that eliminates delays caused by the speed of light
 * Works for all websites, including dynamic sites
 * Achieves 99.6% compression ratio
 * On average, 730% performance increase

Railgun was made available on DreamHost on January 28th, 2013. To learn how to configure Railgun, see CloudFlare Railgun.

Setup Tips
After setting up a few domains through Cloudflare, here are some setup tips:
 * If you have javascript minify on (shown below), it can't handle comments of the form " /* this comment */ ". Only use comments of the form " // comments " in all your javascript.