If you are OK to move to a totally new language with a weak interop story, you might as well just use C++ with asm.js. C++ has many many years of compiler optim

If you are OK to move to a totally new language with a weak interop story, you might as well just use C++ with asm.js. C++ has many many years of compiler optimization work behind it. I am wondering how the comparison would be like. With that being said, I don't believe in anything with a weak interop story unless you are talking about utilizing legacy code, for which there is none for Dart but a lot for asm.js (and pNaCl, for that matter.) So I don't really see why Dart would fare better than GWT.