[anon1385]

>ASM is only 2x slower than native

Only in wilfully misleading benchmarks. Allow use of SIMD and multithreading and asm.js can be as much as 50 times slower:

http://cdn.arstechnica.net/wp-content/uploads/2013/05/native...

http://cdn.arstechnica.net/wp-content/uploads/2013/05/classi...

[nailer]

Good point: re multithreading. I wonder if web workers could be used to resolve that?