2010YOUY01 commented on PR #16889:
URL: https://github.com/apache/datafusion/pull/16889#issuecomment-3126813407

   I tried to eliminate redundant batch transformations, the speedup goes from 
2X -> 3X!
   
   Through the flamegraph, I can see that over 50% of the time is now spent 
evaluating the join filter (e.g. `(c1 + c2) % 10 = 1`). It seems there may not 
be any more low-hanging fruits for further speed improvements.
   
   After a few more chores, this should be ready for review:
   
   - [ ] figure out the output ordering properties and update test
   - [ ] Metrics accounting
   - [ ] Polish(more comments and clean-up)


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