wangyi-fudan/wyhash

Health v2 · maintenance only

Adoption not part of the score

1146 stars · 75 forks observed · 2026-08-28

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

wyhash is a fast, high-quality 64-bit non-cryptographic hash function with accompanying PRNG (wyrand/w1rand) and hash map, written in portable C. It is the default hash in Zig, V, Nim, and Go's runtime, and has evolved into rapidhash.

Use cases

• fastest 64-bit hash function for hash tables
• seeded PRNG that passes BigCrush and PractRand
• hashing for bloom filters
• default hash for language runtimes
• portable hashing across 32/64-bit and endiannesses

When to choose

• you need maximum hashing speed on 64-bit machines, especially for short keys
• you want a tiny, simple, portable hash implementation
• you need a salted hash resistant to intended collision attacks

When to avoid

• you need cryptographic security or full 64-bit collision resistance (it offers ~62 bits)
• you need a PRNG that passes PractRand on very long datasets (32TB+)
• you want the actively evolved successor - consider rapidhash instead

Facets

library · maturity maintenance

cryptography developer-tools performance developer-tools cross-platform c cpp hash-function prng non-cryptographic-hash hashmap bloom-filter smhasher algorithms

Member repositories

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