CRC32 is the same speed as an integer multiply, going all the way back to Nehale... | Hacker News

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		Validark on Sept 11, 2024 \| parent \| context \| favorite \| on: A good day to trie-hard: saving compute 1% at a ti... CRC32 is the same speed as an integer multiply, going all the way back to Nehalem (2008). 3 cycles latency, and you can start a new one each cycle (or more than one, on Zen 5).

hooli42 on Sept 11, 2024 [–]

Sure, in the same way SIMD instructions get a linear speedup in theory.

If you Google the words "CRC32 is slow", you can see hundreds of people complaining about this.

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