Extremely fast non-cryptographic hash algorithm
xxHash is an Extremely fast Hash algorithm, running at RAM speed limits. It successfully completes the SMHasher test suite which evaluates collision, dispersion and randomness qualities of hash functions. Code is highly portable, and hashes are identical across all platforms (little / big endian).
| Branch | Status |
|---|---|
| dev |  |
Benchmarks
The reference system uses an Intel i7-9700K cpu, and runs Ubuntu x64 20.04.
The open source benchmark program is compiled with clang v10.0 using -O3 flag.
| Hash Name | Width | Bandwidth (GB/s) | Small Data Velocity | Quality | Comment |
|---|---|---|---|---|---|
| XXH3 (SSE2) | 64 | 31.5 GB/s | 133.1 | 10 | |
| XXH128 (SSE2) | 128 | 29.6 GB/s | 118.1 | 10 | |
| RAM sequential read | N/A | 28.0 GB/s | N/A | N/A | for reference |
| City64 | 64 | 22.0 GB/s | 76.6 | 10 | |
| T1ha2 | 64 | 22.0 GB/s | 99.0 | 9 | Slightly worse collisions |
| City128 | 128 | 21.7 GB/s | 57.7 | 10 | |
| XXH64 | 64 | 19.4 GB/s | 71.0 | 10 | |
| SpookyHash | 64 | 19.3 GB/s | 53.2 | 10 | |
| Mum | 64 | 18.0 GB/s | 67.0 | 9 | Slightly worse collisions |
| XXH32 | 32 | 9.7 GB/s | 71.9 | 10 | |
| City32 | 32 | 9.1 GB/s | 66.0 | 10 | |
| Murmur3 | 32 | 3.9 GB/s | 56.1 | 10 | |
| SipHash | 64 | 3.0 GB/s | 43.2 | 10 | |
| FNV64 | 64 | 1.2 GB/s | 62.7 | 5 | Poor avalanche properties |
| Blake2 | 256 | 1.1 GB/s | 5.1 | 10 | Cryptographic |
| SHA1 | 160 | 0.8 GB/s | 5.6 | 10 | Cryptographic but broken |
| MD5 | 128 | 0.6 GB/s | 7.8 | 10 | Cryptographic but broken |
... More
| license | BSD-2-Clause |
|---|---|
| project | xxhash |
| url | cyan4973.github.io/xxHash/ |
| src-url | github.com/Cyan4973/xxHash |
1 Version
| version | 0.8.1 |
|---|---|
| repository | https://pkg.cppget.org/1/stable |
| depends | 0 |
| reviews | +1 |