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Re:What makes WebAssembly fast? by bluejekyll on Tuesday February 28, 2017 @09:36PM (#13760468)
But webassembly will allow for typescript or you language of choice, c/c++ and rust first, and as the OP suggests others too.
Re:What makes WebAssembly fast? by kartickv on Saturday March 04, 2017 @11:31PM (#13794613)
The question was whether the concern of JS being frustrating is already solved by TypeScript, in which case WebAssembly is less important than it would be otherwise.

(Which isn't to say that there aren't other questions like efficiency and already-existing codebases written in other languages.)