wyhash and wyrand are the ideal 64-bit hash function and PRNG respectively:
solid: wyhash passed SMHasher, wyrand passed BigCrush, practrand.
portable: 64-bit/32-bit system, big/little endian.
fastest: Efficient on 64-bit machines, especially for short keys.
simplest: In the sense of code size.
g++-9 benchmark.cpp t1ha/src/t1ha2.c -o benchmark -Ofast -s -Wall -march=native
/usr/share/dict/words
| hash function | short hash/us | bulk_256B GB/s | bulk_64KB GB/s |
|---|---|---|---|
| wyhash:safety=0 | 444.31 | 18.86 | 24.35 |
| wyhash:safety=1 | 195.42 | 17.97 | 23.44 |
| wyhash:safety=2 | 181.56 | 14.33 | 15.97 |
| xxh3:avx2 | 147.33 | 9.73 | 45.39 |
| xxh3:sse2 | 154.30 | 11.53 | 27.15 |
| xxh3:scalar | 153.61 | 8.49 | 13.05 |
| xxHash64 | 83.10 | 10.89 | 14.72 |
| t1ha2_atonce | 115.12 | 12.96 | 17.64 |
wyhash is the default hasher for a hash table of the great Zig and V language.
C# https://github.com/cocowalla/wyhash-dotnet
C++ https://github.com/tommyettinger/waterhash
GO https://github.com/dgryski/go-wyhash
GO https://github.com/orisano/wyhash
GO https://github.com/littleli/go-wyhash16
GO https://github.com/zeebo/wyhash
GO https://github.com/lonewolf3739/wyhash-go
Java https://github.com/OpenHFT/Zero-Allocation-Hashing
Rust https://github.com/eldruin/wyhash-rs
Swift https://github.com/lemire/SwiftWyhash
Swift https://github.com/lemire/SwiftWyhashBenchmark
Swift https://github.com/jeudesprits/PSWyhash
V https://github.com/vlang/v/tree/master/vlib/hash/wyhash (v4)
Zig https://github.com/ManDeJan/zig-wyhash
I thank these names:
Reini Urban
Dietrich Epp
Joshua Haberman
Tommy Ettinger
Daniel Lemire
Otmar Ertl
cocowalla
leo-yuriev
Diego Barrios Romero
paulie-g
dumblob
Yann Collet
ivte-ms
hyb
James Z.M. Gao
easyaspi314 (Devin)