“The newly announced TraceMonkey is a trace-based JIT compiler that will be featured in the next release of Firefox and pushes the envelope on JavaScript performance. InfoQ has a Q&A with Mozilla JavaScript Evangelist and jQuery creator John Resig about this exiting development and what it signifies for the future of JavaScript-based RIAs.”
Read more at: http://www.infoq.com/news/2008/09/jresig-tracemonkey