> You can see that thats exactly what it does here: https://godbolt.org/g/NWa5yZ https://godbolt.org/g/NWa5yZ You are wrong as well, that is what it is doing i

> You can see that thats exactly what it does here: https://godbolt.org/g/NWa5yZ https://godbolt.org/g/NWa5yZ You are wrong as well, that is what it is doing if you compile it with -O2 on that exact compiler. Try compiling with -O0 instead and it will include those instructions. Also the number is reasonable, modern cpu cores can execute around a billion loop iterations per second.