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benchmark with fxhash about ramhorns HOT 2 CLOSED

maciejhirsz avatar maciejhirsz commented on June 15, 2024
benchmark with fxhash

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Comments (2)

maciejhirsz avatar maciejhirsz commented on June 15, 2024

ramhorns uses fnvhash as default, however the hasher is interchangeable.

You can only change the hasher used for internal hashmap that handles partials. All regular variable injection is hardcoded to fnv, and there is no way to change it with generics since the hash has to match the output of the derive macro.

FxHash produces collisions on English word dictionaries, where as 64bit fnv does not, so any performance gains there would be void if we had to compare strings by value to get rid of collisions.

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godofdream avatar godofdream commented on June 15, 2024

I was able to reproduce hash collisions with fxhash

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