Yicong-Huang commented on PR #54382:
URL: https://github.com/apache/spark/pull/54382#issuecomment-3947569298

   > @Yicong-Huang Arrow batches keep pandas metadata around, would that be a 
better, more efficient way of keeping track of the original length?
   > 
   
   Thanks @devin-petersohn for the suggestion. I tested locally indeed for this 
edge case, using metadata would be much more efficient. changes pushed. 


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