mingmwang commented on PR #6800:
URL: 
https://github.com/apache/arrow-datafusion/pull/6800#issuecomment-1622933152

   > e the bounds check (and use `unsafe` for the access to `self.counts` an
   
   
   
   > I brought down the difference for query 1 to only ~1.05x (slower) (by 
moving the updates into one loop).
   > 
   > I think we should be able to do the same for `merge_batch` with some 
additional code, not sure if it's worth the additional complexity ATM.
   
   I think it is acceptable for the slowness of q1. I believe we can get the 
performance back in the following PRs.


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