alamb commented on PR #9022:
URL: https://github.com/apache/arrow-rs/pull/9022#issuecomment-3682240368

   Ok, given that totally specializing the slicing didn't help, I am now 100% 
convinced that the difference in performance reported for _sliced24 is due to 
alignment or some other crazy thing.
   
   What I plan to do now is:
   1. Try and update the benchmarks to 1) allocate input arrays before any 
other allocations happen and 2) include more / multiple different alignments 
(will allocate a few different ways)


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