This "the new iPhone is insanely fast at Javascript" story needs to die. It has always been wrong conclusions drawn from the wrong benchmarks. Speedometer is a

This "the new iPhone is insanely fast at Javascript" story needs to die. It has always been wrong conclusions drawn from the wrong benchmarks. Speedometer is a DOM benchmark with very little actual Javascript weight. DOM performance on mobile Safari is relatively good, considering that the DOM in general is a performance trainwreck. Apple has really done a good job optimizing this so that the "modern web" runs on their devices in an acceptable fashion. It probably has a lot to do with efficient GPU interfacing. Furthermore, it is impossible to properly benchmark any JIT language on a non-jailbroken iOS device, because JIT is not allowed on iOS, only Apple's implementations like JavaScriptCore are available. It's pointless to make such benchmarks and draw conclusions about the hardware. Even if you benchmarked JavaScriptCore on different platforms, it wouldn't necessarily be fair, because you don't know how much more effort went e.g. into the ARM backend.