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

Node.js/bun base64 benchmark

In-browser base64 benchmarks

Fast C++ function "is_utf8": checks if the input is valid UTF-8. Made of a single source file. Optimized for ARM NEON, x64 SSE, AVX2 and AVX-512.

Collection of simdutf benchmark results from various machines

Fast WHATWG forgiving-base64 decoding in C#

Fast SIMD-based UTF-8 Validation in C#

Using simdutf with vcpkg