Dandandan commented on PR #20004:
URL: https://github.com/apache/datafusion/pull/20004#issuecomment-3799664277

   > Thanks @Dandandan -- this looks good to me
   > 
   > It also makes me wonder if there is more performance to be had in our 
statistics management -- for example, I notice that there are multiple call 
sites that convert the max values (when the table is first created and then 
during query to try pruning)
   > 
   > 
https://github.com/search?q=repo%3Aapache%2Fdatafusion%20row_group_maxes&type=code
   
   I think there is also a lot of overhead in creating `Array` accumulators, 
etc. (columnar datastructures) for essentially only a bunch of values...


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