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Actually Emscripten allows you to port an existing native application to JS, and the development effort is comparable to using NaCl.


Yup. They've ported all sorts of things with Emscripten, including, I believe, Ruby, Python and Perl.


Yes. But it's a POC thing that's also some orders of magnitude slower...


It's not orders of magnitude slower, most benchmarks have it 2x-6x slower. It's rarely slower than 10x (one order of magnitude). And that is before JS engines even start to optimize for it.




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