Marvin32 for Rust
This crate houses a native implementation of the non-cryptographic but DoS-resistant marvin32 hash algorithm, most known for being the default string hash algorithm in .NET Framework and .NET Core.
Compared to rust's default SipHash algorithm:
- It is is somewhat faster for shorter string lengths
- It takes a mandatory 64-bit seed (should be securely randomly generated and kept private)
- It generates a 32-bit hash value
If you're interested in replacing SipHash and you understand what DoS resistance means in the context of a non-cryptographic hash and know that you don't need a proper cryptographic hash, marvin32 might be an option if you still need DOS protection. Otherwise, you're certainly better off with either a fast cryptographic hash like blake3 or an even faster non-cryptographic (and non-DoS-resistant) hash like fnv or aHash for hashmap/hash table lookups or something like xxh3 or aHash for general purpose hashing.
The biggest reason this crate exists is really for interop compatibility with .NET Core, letting you generate C#-compatible string hashes from a rust context.
Note that while Microsoft's implementation of marvin32 is released under the MIT license as part of the open source .NET runtime, it is known to be covered by at least one Microsoft patent. Microsoft has a patent waiver covering the use of marvin32 as part of the .NET Framework and .NET Library/Runtime, but you're on your own otherwise.