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Siphash is too slow, use HighwayHash #33

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jserv opened this issue May 6, 2020 · 0 comments

jserv commented May 6, 2020

Use Google's HighwayHash or AVX2 implementation of Siphash.

Our SipHash implementation is a fast and portable drop-in replacement for the reference C code. Outputs are identical for the given test cases (messages between 0 and 63 bytes).
Interestingly, it is about twice as fast as a SIMD implementation using SSE4.1 (https://goo.gl/80GBSD). This is presumably due to the lack of SIMD bit rotate instructions prior to AVX-512.

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