100
Bit idea : The Witcher 3 written in assembly with 40 billion lines of code so you can run it on an old windows 98 desktop
(hexbear.net)
I don’t wanna any nerds in here explaining why this is impossible I choose to believe it could be done in theory
Compilers have become great at optimizing code, yes. If you translate your C code to assembly, you're probably gonna have worst code than the compiler's. The benefits from coding assembly come from a different design, not different translation.
The compiler can't change the design to make it better, but you can if you design it thinking directly in assembly, IMHO.
I have no idea about GPU programming, tho.