Twenty New Yahoo! Performance Breakthroughs
I don't know how many of these are "breakthroughs," but if you really are getting an A (and even if you're not), you might want to take a look at the following enhancements to squeeze the most out of your site's performance:
Looking at the list, many are already very familiar to me, but there are definitely a couple I'm interested in learning more about- more than a full bullet points in the above slideshare. Hopefully the teaser of "more detail coming soon" in the YDN blog post will come to pass sooner rather than later.
And no, I don't yet score an A, but I do get a 96 for the components I fully control, so I'm more than happy to look to other suggestions (like the ones below that I don't already practice) to get this place running a little quicker.
1. Flush the buffer early [server]
2. Use GET for AJAX requests [server]
3. Post-load components [content]
4. Preload components [content]
5. Reduce the number of DOM elements [content]
6. Split components across domains [content]
7. Minimize the number of iframes [content]
8. No 404s [content]
9. Reduce cookie size [cookie]
10. Use cookie-free domains for components [cookie]
11. Minimize DOM access [javascript]
12. Develop smart event handlers [javascript]
13. Choose over @import [css]
14. Avoid filters [css]
15. Optimize images [images]
16. Optimize CSS sprites [images]
17. Don't scale images in HTML [images]
18. Make favicon.ico small and cacheable [images]
19. Keep components under 25K [mobile]
20. Pack components into a multipart document [mobile]
More at the YDN blog: