BurntSushi/memchr

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1542 stars · 151 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Rust library providing heavily optimized byte and substring search routines, accelerated with SIMD on x86_64, aarch64, and wasm32. It operates on raw bytes without regard to encoding and supports no_std environments.

Use cases

• find the position of a byte in a slice as fast as possible
• search for a substring in a byte buffer
• parse large text or binary files quickly in Rust
• write a no_std crate that needs fast byte searching
• speed up tokenization or splitting on delimiters
• implement a custom text search engine or regex engine

When to choose

• you need maximum-performance byte or substring search in Rust
• you want SIMD acceleration with portable fallbacks
• you need no_std support
• you are building parsers, regex engines, or text processing tools

When to avoid

• you need Unicode-aware string search with encoding semantics
• you need regex or multi-pattern search (use the regex or aho-corasick crates)
• you are not working in Rust

Facets

library · maturity stable

search-engine parser developer-tools performance developer-tools parsers rust wasm cross-platform memchr substring-search simd no-std bytes string-searching rabin-karp twoway algorithms

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