Huh, that's strange Firefox nightly here is slower than Crankshaft:
http://krakenbenchmark.mozilla.org/kraken-1.0/results.html?%...
http://krakenbenchmark.mozilla.org/kraken-1.0/results.html?%...
Doing the comparison thing, apparently TraceMonkey is ~1.2x slower than Crankshaft on your machine. Things are hotting up indeed!