perf: optimize picker consistent hash by eliminating map lookup (#13)#22
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thrawn01 merged 1 commit intogroupcache:mainfrom Dec 25, 2025
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Replace hashMap with entry struct that stores hash and client together, eliminating the map lookup after binary search in Get(). This optimization was ported from groupcache2 where it showed ~15-25% improvement in Get() operations.
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@thrawn01 can you take a look at this? Pretty small change as in the issue discussion, didn't do anything new. Hope it was still required as I saw it was tagged "help wanted". |
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Thank you for making this PR! ❤️
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Summary
This PR optimizes the consistent hash picker by eliminating the
hashMapmap lookup in theGet()method as suggested in #13Changes
entrystruct that stores both the hash value and client reference togetherkeys []int+hashMap map[int]Clientwithkeys []entryAdd()to usesort.Sliceinstead ofsort.IntsGet()to access client directly fromentry.clientBenchmark Results (Apple M1 Pro)