First off, if you haven’t guessed it, this module directly complements Google’s PageSpeed Insights. It’s a great module for giving you feedback on what can be done to optimize your site. What I’ve found is many of the issues this tool reports back to you can be resolved automatically by the PageSpeed module (PSM) simply by installing it. Google can tell you what needs to be optimized and how to optimize it, so why not let them do it for you?
Second, you should know that I wouldn't take the time to share all this information if I hadn't tested it multiple times. The following screenshot demonstrates what's reported in Google Webmaster Tools after implementing everything in this blog post. What Google's data is showing is they are downloading pages from our site in 80 milliseconds. 80 milliseconds! I've never seen speeds that fast. Implementing the recommendations in this post is going to get you there, too (or at least give you greater speed gains than you already have).
- Enable compression
- Optimize CSS Delivery
- Minify CSS
- Optimize images