alamb opened a new pull request, #7541:
URL: https://github.com/apache/arrow-rs/pull/7541

   # Which issue does this PR close?
   
   Related to #7458 
   
   # Rationale for this change
   It has been observed that `and_then` is slow. Let's try and optimize it by 
avoiding an extra copy
   
   # What changes are included in this PR?
   
   1. Refactor code into explicit iterators so we can build the final output 
RowSelection directly from filters, rather than instantiating the intermediate 
selectors first.
   
   # Are there any user-facing changes?
   No (other than hopefully faster performance)
   
   


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