Python 3.10 has built-in bit_count

[Sxderp]

https://docs.python.org/3/library/stdtypes.html#int.bit_count

It's implemented in C so should have similar speed to the C extension in the repo. By switching to the built-in the compile / module dependency can be removed.

[unmade]

Hey @Sxderp,

Let me check performance of that method and maybe I'll add it. It is kinda an abandoned project of mine :)