alamb commented on issue #3620:
URL: https://github.com/apache/arrow-rs/issues/3620#issuecomment-1591204643

   >  the exact same principle also holds for null masks
   
   I think they are "almost always" the same. For example the (non null) values 
of [`or_kleen`](https://docs.rs/arrow/latest/arrow/compute/fn.or_kleene.html)'s 
depend on the null values of its input
   
   However, it is an excellent point that for many kernels, the implementation 
is probably exactly the same after "AND"ing together the validity mask and 
selection vector.


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