What's the point of writing something in Java if you have to do manual memory management and can't use any of the platform library? asm.js makes sense for perfo

What's the point of writing something in Java if you have to do manual memory management and can't use any of the platform library? asm.js makes sense for performance critical code that you would in other languages write in C. So, in a game you could write your game engine or at least your graphics engine in C/C++ and then add a scripting language for logic (JavaScript/Java/Python/Lua/...). You could compile the engine from C/C++ to asm.js and the game logic to JavaScript. But compiling a classical high(est) level, GC collected language that is mostly defined by its standard lib (read: Java) to asm.js seems weird.