pepijnve commented on PR #16319:
URL: https://github.com/apache/datafusion/pull/16319#issuecomment-2956607445

   I had a look at `clickbench_extended`. I cannot explain the slowdown. Those 
queries do not even use sorting or joins. The plan for the first one for 
instance is
   
   ```
   AggregateExec: mode=Final                                                    
                                                                                
                                                                                
                                                                                
                                                                                
                                                             
     CoalescePartitionsExec                                                     
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                
       AggregateExec: mode=Partial                                              
                                                                                
                                                                                
                                                                                
                                                                                
                                                             
         DataSourceExec:
   ```


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