I did some experimentation with popcnt in C++ six years ago and was impressed to find that the intrinsic in gcc was faster than the best inline assembly I could

I did some experimentation with popcnt in C++ six years ago and was impressed to find that the intrinsic in gcc was faster than the best inline assembly I could come up with using the popcnt instruction: https://github.com/bobbyi/Fast-Bit-Counting https://github.com/bobbyi/Fast-Bit-Counting