memchr

memchr 2.8.1 is a #![no_std] library providing SIMD-accelerated byte and substring search (Two-Way, Rabin-Karp, Shift-Or, plus per-arch SSE2/AVX2/NEON/simd128). No build.rs, no proc macros, no I/O, two optional deps. The crate uses extensive unsafe for SIMD intrinsics and raw-pointer loops, but every boundary carries a # Safety block, quickcheck property tests check each implementation against a naive reference, and the upstream tree has miri configuration and 8 cargo-fuzz targets. No findings.

memchr 2.8.0 implements SIMD-accelerated byte search (1/2/3 needles, forward/reverse) and substring search for arbitrary byte slices. The 325 unsafe blocks are confined to SIMD intrinsics, pointer-walking loops, and CPU dispatch; each carries a SAFETY comment and the AVX2 path is gated behind a runtime feature check. Quickcheck property tests and upstream cargo-fuzz targets cover all search variants. No findings.