Cyan4973/xxHash

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

11220 stars · 912 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

xxHash is an extremely fast non-cryptographic hash algorithm library written in C, offering XXH32, XXH64, and the modern XXH3 family (64- and 128-bit variants). It runs at RAM speed limits, is highly portable across platforms and endiannesses, and passes the SMHasher quality test suite.

Use cases

• fast checksums for files or data blocks
• hash table key hashing in performance-critical code
• data deduplication fingerprints
• detecting data corruption in storage pipelines
• consistent hashing across platforms and endiannesses
• benchmarking hash function throughput

When to choose

• you need maximum hashing speed at RAM bandwidth limits
• you need identical hash values across platforms and endiannesses
• you need high-quality non-cryptographic hashes validated by SMHasher
• you need 32-, 64-, or 128-bit hash widths including SIMD-accelerated XXH3

When to avoid

• you need cryptographic security against adversarial inputs (use SHA-256/Blake3)
• you need keyed hashes resistant to hash-flooding (use SipHash)
• your environment lacks a C compiler and you need a pure high-level-language implementation

Facets

library · maturity stable

cryptography serialization developer-tools performance developer-tools databases cross-platform cpp c hash-function non-cryptographic checksum xxhash smhasher simd algorithms

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