mightsleep commented on issue #11543:
URL: https://github.com/apache/arrow-rs/issues/11543#issuecomment-6669039186

   ty, useful. The M2 result fits what I'd expect, since popcount goes through 
the vector registers there. Could you push the variants to a branch and run the 
1/16 rows on the GitHub arm runners (Neoverse)? That's where the regression 
showed up, and it's worth looking at why only 1/16 regressed.


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