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> JavaScript is the fastest interpreted language and plans are out to make it even speedier.

Citation needed

With JIT compilation, asm.js, tracing, it is hard to argue against. A long fought browser war really brought out the maximum capabilities of the JavaScript engine.

http://en.wikipedia.org/wiki/JavaScript_engine#Performance_e...

asm.js promises speed 2x slower than native code. For interpreted code, that is amazing.

None of those are interpreters. You're trying to compare Javascript against other JITted / compiled languages. Mozilla themselves claim that asm.js is only about 2x slower than C.

How about JavaScript is the fastest dynamically typed language?

is it outperforming lua jit in all or many benchmarks?

It's been a while since I rolled up my sleeves and ran various algorithms in js vs lua vs py (pypy was speedy as well last I checked).

asm.js isn't dynamically typed afaik, so I think of a fair comparison as v8 vs luajit

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