Performance By Design

This is a continuation of a series of blog entries on this topic. The series starts  here . In this post, I discuss one more performance tool that belongs in the YSlow family. It is called WebPageTest , and it makes a credible attempt at addressing some of the limitations of the YSlow approach I have been writing about. The WebPageTest  tool does measure Page Load time, and offers several other useful goodies, including a revised set of performance optimization rules to consider. WebPageTest  builds on the legacy of YSlow, while also trying to address some of the limitations of the original approach with today’s JavaScript-enhanced web applications.  Focusing as the original YSlow approach does on the web page composition process performed inside the browser, one of YSlow’s legacies is that it spawned the development of web application performance tools that measure the page load time, addressing one of the important limitations of the original YSlow approach...