viirya commented on PR #1055:
URL: 
https://github.com/apache/datafusion-comet/pull/1055#issuecomment-2477203280

   > 1T q39a `(33349-28714)/33349 ~= 14%`
   
   33349 obviously looks like it is affected by some noises.
   
   q44 avg diff is also ~ 5%.
   
   > The performance gain is proportional to the input size by design because 
it saves the overhead for all input arrow vectors.
   
   I mean it is less significant with longer query time. For queries running 
many minutes or hours, it has no difference.
   If this is a trivial change, it will be good. But as I took a quick look, 
the change is not small and doesn't look like in good design to me.
   
   I doubt that if it is worth.


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