mbutrovich commented on issue #11776:
URL: https://github.com/apache/arrow-rs/issues/11776#issuecomment-6345432851

   https://github.com/apache/arrow-rs/issues/11776#issuecomment-6337172176
   
   > @mbutrovich Can you please run the benchmark on non-apple arm64 machine, 
sometimes apple perf can be very different especially with Neoverse v1 and v2 
like AWS Graviton 3 and 4.
   
   On Neoverse V2 (Google Axion), `true_count` without nulls in #11818 is 1.87x 
faster at 65536 bits. It held with code layout controlled. The PR description 
has the other sizes and the amd64 results.
   
   @mightsleep, the 64-bit cases on amd64 are also faster (2.2x), and I can't 
explain it from the generated code. Would you be up for running 
`true_count(all_true, 64)` from the `boolean_array` bench on `main` and on 
#11818 under `perf stat` on your Zen 5 machine?
   


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