Dandandan commented on PR #16647:
URL: https://github.com/apache/datafusion/pull/16647#issuecomment-3031974821

   > Sometimes, i found sort_tpch10 will get the more accurate or good result 
when we optimize the merge part, because our in_mem sort buffer is 1MB, so the 
sort_tpch will have less count for merge compare count, i added the sort_tpch10 
to bench.sh, hope it will be helpful:
   > 
   > #16671
   
   Ah, that makes sense, maybe that explains the difference in results. Let's  
compare sort_tpch10 as well.


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