Top SIMD GitHub Repositories & Tools (2026)

Unsafely fast hashing algorithm 📈

A C++-based, cross platform ray tracing library

Lossless AI compression: 33% less GPU memory, bit for bit.

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

JS to WASM compiler

🐈‍⬛ A runtime for C++26 w/out libC or POSIX. Smaller binaries, only arena allocators, SIMD, stronger type safety than STL, and value-based errors!

Fast, memory-safe Rust zstd codec with all-level decode, -8..4 encode, and dictionary training.

A few classes for extremely fast json parsing/serializing in modern C++. Possibly the fastest json parser in C++. Possibly the fastest json serializer in C++.