I am also wondering whether ahash is faster. ahash is developed with rust. We need a head to head comparsion. However, it is not available in SMHasher package.
https://github.com/tkaitchuck/aHash/tree/master/smhasher
There are also ahash's own benchmarks here:
https://github.com/tkaitchuck/aHash/blob/master/compare/test...
They use the wyhash Rust crate, so if wyhash itself was updated doing a head to head comparison would boil down to updating the wyhash crate and rerunning ahash's benchmark suite.
1kb string:
- ahash: 23.0ns
- wyhash (rust crate): 54.2ns
- wyhash (new): 34.8ns
u64:
- ahash: 0.69ns
- wyhash (rust crate): 1.6ns
- wyhash (new): 0.97ns
Very interesting is his claim to create wyhash collisions at will. Even with bad keys, not bad seeds!
It may be the fastest rust hash, but certainly not faster than other fast hashes. More like 2x slower.
xxh3, t1ha0, wyhash are all much faster on the 2 machines I tested it on, an old 7 years old Intel i5-2300, and a new Ryzen 3200U.
If it's so much slower then most likely something is wrong.
1) Did you enable the AES instruction when compiling? (IIRC it's disabled by default) 2) When compiling the benchmark did you have cross-language inlining enabled? (IIRC you need to compile your C++ code with a specific version of Clang to get it to inline between Rust and C++)