Novos builds do WebKit mostram melhorias de performance para o JavaScript. Parece que a Apple está aprontando alguma para a WWDC…
Apesar de ter aparecido no build para OS X, podemos imaginar numa aprimoramento para iOS também.
FTLJIT is still considered experimental, so although it’s being made available in the OS X port of WebKit by default, it’s not actually turned on yet — it has to be enabled through command-line flags.
One attribute that could make FTLJIT stand out from the pack all the more is how well it runs JavaScript code that is not specifically optimized for [Mozilla’s] asm.js. Every JavaScript engine will run asm.js code, but only Mozilla’s SpiderMonkey honors asm.js-specific optimizations, and right now no other browser maker has elected to follow Mozilla’s lead. (traduzir)
via MacRumors