11m INTERNET HAS DEVELOPED at an astonishing pace over the past several years. Until quite recently, most Web sites consisted of a collection of static pages linked in a web of hyperlinks and anchor tags. From these humble origins, a typical Web site today is a rich, graphically intense experience that interacts with the user. are more feature-rich than ever before, and developers face Currently, Web sites the dual challenges of delivering rich features and delivering good performance. The best Web site in the world will impress no one if the pages will not load quickly and the user is kept...