. Yet, it's still behind competitors like Chrome
This approach provided a significant boost in speed, when it worked. When it didn't, the underlying engine, SpiderMonkey, was still significantly slower than its competitors. With JaegerMonkey, Mozilla aims to take its tracing method and apply it to a faster base and also borrows from one of its competitors, Apple, to get the best possible results.JaegerMonkey
"Why couldn’t we trace and keep going SUPER AWESOME FAST, and when tracing fails, fall back to STILL REALLY FAST?" Mozilla's David Anderson asks
and this is before the two components have been put together and with very little optimization. Granted, JaegerMonkey is still a long way off from landing in a Firefox stable build, it's not even in the Firefox nightly developer builds. But if progress moves at a fast enough pace, it should give Mozilla's browser a fighting chance perhaps by the time Firefox 4.0 lands.