🚀 Fast C/C++ bit population count library

• Updated Jun 26, 2026
• C++

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

• Updated Apr 1, 2024
• C++

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

• Updated Jan 23, 2020
• C

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

• Updated Dec 16, 2019
• C

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

• Updated Dec 16, 2019
• C

Fast algorithms for computing XX^T for binary matrices

• Updated Sep 24, 2019
• C

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

• Updated Aug 21, 2020

Accelerating convolution using numba, cupy and xnor in python

• Updated Feb 16, 2020
• Jupyter Notebook

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

• Updated Apr 22, 2023
• C

Draft specification for bit popcount in JavaScript.

• Updated Jul 15, 2022
• HTML

Simple compact popcount array map

• Updated Oct 25, 2017
• Rust

Utility methods for bitwise operations in Ruby.

• Updated Sep 19, 2016
• Ruby

A recreation of the c++20 bit.h header written in c++14.

• Updated Jun 22, 2025
• C++

Generates random values with a specific hamming weight.

• Updated Mar 1, 2019
• C

Count the number of one bits of standard input

• Updated Oct 1, 2025
• Assembly

Exploration of popcount algorithms for Quantum Computers.

• Updated Dec 12, 2024
• Jupyter Notebook