A few months back I had a conversation with Chris Coyier about WordPress performance. We touched on fragment caching so I got into reading on the topic and ended up coming up with a pretty useful snippet. I wrote a post on the topic which was published on CSS-Tricks today.
I have learned so much using CSS-Tricks as a resourse. It's a huge honor to be published on this site.
Also, star the WordPress Fragment Cache repository on Github.