How is Page Speed different from YSlow?
YSlow is a great product from Yahoo! and there are a number of other tools available that help optimize pages for speed. Anything that helps webmasters design faster sites is a benefit to everyone. YSlow and Page Speed use some common “rules” that are based on industry best practices. There are, however, some rules, such as deferring JavaScript until after the page has loaded, that Page Speed implements exclusively. In addition, Page Speed provides you with an activity panel that allows you to do a “before and after” comparison when considering the implementation of Page Speed’s suggestions. Finally, Page Speed is an open-source tool that is open to community contributions.
