google/cityhash
Automatically exported from code.google.com/p/cityhash observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4037
- days_rel: n/a
- days_push: 863
- n_releases_24m: 0
Adoption not part of the score
1233 stars · 198 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
CityHash is a family of fast, non-cryptographic hash functions for strings, implemented in C++ under the MIT license. It offers 32-, 64-, 128-, and 256-bit variants optimized for speed on both short hash-table keys and long strings.
Use cases
- fast string hashing for hash tables
- non-cryptographic checksum of strings
- hash long strings quickly on 64-bit CPUs
- replace murmur hash in performance-critical code
- compute 128-bit or 256-bit string hashes
When to choose
- you need very fast, high-quality non-cryptographic string hashes
- you are building hash tables with short string keys
- your CPU supports CRC32 instructions and you want maximum throughput
When to avoid
- you need cryptographic or security-sensitive hashing
- you need a stable hash across versions or platforms for persistence
- you are on AMD CPUs or lack CRC32 instructions, where SpookyHash may be better
Facets
library · maturity maintenance
cryptography serialization performance developer-tools cpp cross-platform hash-functions non-cryptographic-hashing string-hashing hash-tables algorithms
1 source
- readme: https://github.com/google/cityhash · fetched 2026-08-28 · 24872d5399a9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| google/cityhash | main | 10 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem