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Microsoft® ASP.NET and AJAX: Architecting Web Applications by Dino Esposito

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The problem with today’s Web pages is that they are cumbersome. Or should I more elegantly say, rich? Such pages take a while to download and refresh. And having a significant set of interactive features, they tend to refresh quite often. The result is that their users spend a lot of time just waiting for the browser’s window to redraw.

This waste of time would even be valuable if only the new content could justify it. Instead, for the most part, the new content is the old content with some very small exceptions. Fact is, in nearly all postbacks only a small fraction of the page is really updated, but the whole page is served.

After all, this is just the reason that led to the introduction of the AJAX paradigm. The AJAX paradigm, ...

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