And it is amazing that JS is even in the same ballpark as Java It's not. The comparison is between C++/native, C++/asm.js and Java/Dalvik. Yes, one of the C++

And it is amazing that JS is even in the same ballpark as Java It's not. The comparison is between C++/native, C++/asm.js and Java/Dalvik. Yes, one of the C++ benchmarks goes through an intermediate Javascript stage, but the whole point of asm.js is that we can do so without too much of a performance penalty.