Things are really heating up with the latest betas of Google Chrome and Firefox 3.1 browsers:

Google Chrome’s latest version, 0.3.154.9, shows a 37 percent JavaScript performance improvement over the initial beta released two months ago. JavaScript is a programming language used to add some pizazz to innumerable Web pages, but more importantly from Google’s perspective, to power sophisticated Web applications such as Google Docs, Google Calendar, and Gmail. JavaScript is also up against Adobe Systems’ Flash and Flex, Microsoft’s Silverlight, and HTML 5, in the competition for what’s the best foundation for Web applications.
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The new Chrome score catches closer to the 2,250 millisecond score of Firefox 3.1 beta 1 with its new TraceMonkey JavaScript engine enabled. (Tech-Recipes has useful instructions on how to enable TraceMonkey.)