Dandandan opened a new issue, #15720:
URL: https://github.com/apache/datafusion/issues/15720

   ### Is your feature request related to a problem or challenge?
   
   While reviewing our Sort code, I found `Rows` is being allocated within 
`RowCursorStream` for each batch (via `RowConverter::convert_columns`)
   This involves a number allocations (exponentially allocating based on `Vec`) 
for each batch.
   We should avoid this and reuse `Rows` for the stream.
   
   ### Describe the solution you'd like
   
   Find a way to reuse `Rows` for the entire stream.
   
   ### Describe alternatives you've considered
   
   _No response_
   
   ### Additional context
   
   _No response_


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