A Study of Ajax Performance Issues

Quite interesting study from Coach Wei, of Nexaweb and Apache:

Introduction:
Ajax application performance largely depends on the performance of JavaScript execution and browser DOM operations. I’ve heard various people saying various things about Ajax performance. Some people say JavaScript is just too slow. Some people say that the problem is not JavaScript but rather Browser DOM being too slow. Some people would then argue that browser DOM operations are fine. The problem is Internet Explorer that is unbelievably slow.

More specifically, here is a list of Ajax performance issues:
1. Array performance on all browsers in general
2. HTML DOM performance in general
3. Calculating Computed Box Model and Style
4. FireFox: “eval”, Object Creation and “in” Operation
5. “String” Manipulation Performance on IE
6. Safari: “pop” Operation Performance

Check out the whole study here


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