SIMD (SSE) population count --- http://0x80.pl/articles/sse-popcount.html

🚀 Fast C/C++ bit population count library

Fast C header-only library for popcnt, pospopcnt, and set algebraic operations

Bit Twiddling Hacks (Bit manipulation tips and tricks guide) by Sean Eron Anderson

Fast C functions for the computing the positional popcount (pospopcnt).

Efficient C functions to compute the summary statistics (flagstats) for sequencing read sets.

Fast algorithms for computing XX^T for binary matrices

Count the number of one bits of standard input

Simple compact popcount array map

Popcount is a program that returns the number of set bits, that is, bit whose value is 1, in a uint64 value, which is called its population count.

Accelerating convolution using numba, cupy and xnor in python

PostgreSQL Extension introducing popcount[|32|64|Asm|Asm64|256](bit(n)).

Draft specification for bit popcount in JavaScript.

Utility methods for bitwise operations in Ruby.

Generates random values with a specific hamming weight.