From the B* Slap dept.:
We have been busy, mostly fixing bugs for stability, but also winning a bit more performance, since TraceMonkey landed on mozilla-central, from which Firefox 3.1 alpha-stage nightly builds are built. Tonight's builds include a fix for the bug that ilooped a SunSpider test (my apologies to those of you who suffered that bug's bite).

But what I'm sure everyone wants to know is: how do we compare to V8?

...We win by 1.28x and 1.19x, respectively. Maybe we should rename TraceMonkey "V10" ;-)

mozillazine.org