Dandandan commented on PR #21484:
URL: https://github.com/apache/datafusion/pull/21484#issuecomment-4211862173

   Results look really good!
   
   I wonder if you thought about the following:
   
   * Conversion to row format for multiple columns (like SPM, topk, etc.) . 
DynComparator is faster but still does dynamic dispatch and for a larger number 
of columns does a bigger number of comparisions.
   * specializing for single-column case


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