js8544 commented on issue #38372: URL: https://github.com/apache/arrow/issues/38372#issuecomment-1772383228
> Ah, so it's a hash table with SIMD-optimized lookup? Well it's a speedup even without SIMD instructions. To put it in a oversimplified term each slot occupies 1 byte so with int64 we can already check 8 slots at the same time. But SIMD can definitely make it even faster. > If you're going to use SIMD lookups, then I would ask that it relies on xsimd instead of intrinsics. Sure, if we decide to write our own version. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
