Steve's book, High Performance Web Sites, describes the 14 best practices he developed while working as the Chief Performance Architect at Yahoo! YSlow, the Firebug extension he created, codified those best practices. Now working at Google, Steve discusses the next set of best practices he's discovered, including the impact of iframes and where to place (and where not to place) inline script blocks.

In this session you learn:

• How to make your Web sites 25-50% faster;
• The impact of iframes on your Web site, including blank iframes;
• How inline scripts block rendering in the entire page and downloads;
• What you might be doing with style sheets that make your pages twice as slow;
• The various techniques for dynamically loading JavaScript, and how they vary in how they affect the browser

This session was recorded at The Ajax Experience conference in Boston, Massachusetts, September 29 - October 1, 2008.