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Thoughts on Rust Hashing

https://purplesyringa.moe/blog/thoughts-on-rust-hashing/

by usdogu • 2 years ago

3 2 2 years ago

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pkhuong• 2 years ago

The performance complaints seem to be mostly about buffer management. Rust hashers may flush their internal buffers whenever they want, as long as it's deterministic:

Thus to produce the same hash value, Hash implementations must ensure for equivalent items that exactly the same sequence of calls is made – the same methods with the same parameters in the same order.

https://doc.rust-lang.org/std/hash/trait.Hasher.html

purplesyringa• 2 years ago

This permission does not grant the hasher any ability to detect when flushing is most efficient. Nor does constant flushing help with performance.

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