Implementations of SIMD instruction sets for systems which don't natively support them.

Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12, Chromium, Redis and WebKit/Safari

A simple and fast linear algebra library for games and graphics

WHATWG-compliant and fast URL parser written in modern C++, part of Node.js, Clickhouse, Redpanda, Kong, Telegram and Cloudflare Workers.

Unicode routines (UTF8, UTF16, UTF32) and Base64: billions of characters per second using SSE2, AVX2, NEON, AVX-512, RISC-V Vector Extension, LoongArch64. Part of Node.js, WebKit/Safari, Ladybird, Cloudflare Workers and Bun.

Expressive Vector Engine - SIMD in C++ Goes Brrrr

Fastest Integer Compression

SIMD Library for Evaluating Elementary Functions, vectorized libm and DFT

fccf: A command-line tool that quickly searches through C/C++ source code in a directory based on a search string and prints relevant code snippets that match the query.

Agenium Scale vectorization library for CPUs and GPUs

TurboRLE-Fastest Run Length Encoding

Boost SIMD

SIMD macro assembler unified for ARM, MIPS, PPC and x86

A general purpose machine code manipulation library for x86-32 (IA-32) and x86-64 (AMD64) architectures (Assembler, Disassembler, Library).

Optimized Recursive Bilateral Filter

Fastest Histogram Construction

A simple demo shows how to use the SIMD,Single Instruction Multiple Data, to optimize and accelerate the FFT algorithm.

Low level generic SIMD wrapper for x86, ARM, WASM with dynamic dispatch

x64 Assembly Demo Framework

A header only ready to include mirror of the HIIR library by Laurent De Soras, an oversampling and Hilbert transform library in C++, with additional support for double precision on ARM AArch64 using Neon.