Leonid Efremov

Wow.

I compared WebKit’s new SquirrelFish bytecode JavaScript interpreter against Tamarin, the JIT JavaScript engine currently in Flash 9 and in development for Firefox.
On the SunSpider JavaScript benchmark, SquirrelFish is at least 1.9 times faster than Tamarin with tracing turned on; 1.8 times faster than vanilla Tamarin, the same engine used in Flash 9. When you add type annotations to Tamarin (SquirrelFish doesn’t support them), Tamarin gets a little faster, but is still slower than SquirrelFish on these benchmarks.
Keep in mind, SquirrelFish’s reported times include source compilation, while Tamarin is executing pre-compiled bytecode outside the test.

Статья целиком здесь.