brunal commented on PR #7933:
URL: https://github.com/apache/arrow-rs/pull/7933#issuecomment-3876602461

   This isn't ready as-is:
   * aggregate works, but is inefficient for min-max: it goes through all 
values (cost `O(n*log(n))` for n values), when it could just look at the 
run-ends child array (cost `O(# runs)` < `O(n)`)
   * cmp only implements distinct, and is inefficient as well (binary searches 
for logical->physical index)
   
   I'll send a first PR just for aggregate, and later a second PR for cmp.


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