What about features like harmony proxies? I'd like to see someone transpiling that to ES5 and getting code that isn't super-slow. Edit: Consider this dummy exa

What about features like harmony proxies? I'd like to see someone transpiling that to ES5 and getting code that isn't super-slow. Edit: Consider this dummy example: f(a, b) { return a + b; } With operator overloading, the compiler has to account for that, and must transpile to e.g. function f(a, b) { return __invokePlus(a, b); } Unless the programmer adds type hints f(num a, num b) { return a + b; } Edit: mraleph told me that I'm incorrect - apparently the transpiler does global type inference on the code and will only generate a function call if the type needs it (or if it can't figure out the type)