dan-s1 commented on PR #10058:
URL: https://github.com/apache/nifi/pull/10058#issuecomment-3019684760

   @zhtk I think overall this is a great idea. I had noticed SplitExcel was 
sluggish but until you I had not heard any complaints about it. What you have 
implemented is very similar to what POI has in `HSSFRow` with the method 
`copyRowFrom`. I had learnt about this when implementing 
[NIFI-14538](https://issues.apache.org/jira/browse/NIFI-14538). I have linked 
that ticket to your ticket. Hence I believe we should submit a ticket to POI 
for them to implement a similar method for XSSFSheet. I think you should give 
the justification you gave in the ticket that the current `copyRows` is a 
memory hog. Only in the event POI does not want to implement this method, I 
would then say go ahead with your code.


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