cmuratori/meow_hash

Health v2 · maintenance only

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1829 stars · 65 forks observed · 2026-08-28

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

Meow Hash is an extremely fast non-cryptographic hash function taking a 128-byte seed and producing 128-bit output, implemented in C/C++ using x64 AES-NI instructions. It is classified as level 1, meaning it is unsuitable for MACs or adversarial hash-table scenarios but excellent for non-adversarial bulk hashing.

Use cases

• fast non-cryptographic hashing of large buffers
• hashing data for checksums in non-adversarial settings
• high-performance hashing for content-addressed storage
• benchmarking hash function speed against xxHash and similar
• hashing where AES-NI hardware acceleration is available

When to choose

• you need maximum bulk hashing throughput on x64 CPUs with AES-NI
• your hashing workload is non-adversarial and collision attacks are not a concern
• you want a 128-bit output hash with a large 128-byte seed

When to avoid

• you need a hash for message authentication codes - use SipHash instead
• hash tables may face collision-induced denial-of-service attacks from untrusted input
• you need a platform without x64 AES-NI support or an officially vetted port

Facets

library · maturity maintenance

cryptography security performance developer-tools cpp windows cross-platform non-cryptographic-hash aes-ni hash-function simd algorithms linux

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