Dave Artz, co-author of the Website Optimization Metrics chapter, created a screencast about AOL Pagetest. This performance tool we feature in the Secrets book as best in breed (now released to the public as open source).
Dave walks you through how to analyze your site using the reports generated by AOL Pagetest and explains why and how to go about addressing your pressing performance issues. Dave demos the tool, dissects an HTTP request, shows the importance of CDN’s and keep-alives, and a handy Apache module to concatenate CSS and JavaScript.