Dandandan commented on PR #20839:
URL: https://github.com/apache/datafusion/pull/20839#issuecomment-4034155970

   > Thanks @Dandandan just yesterday I was looking into datafusion parquet 
reads takes more memory comparing to jvm+native and came to some hotspots, one 
of them as you mentioned in `get_byte_ranges`
   > 
   > let me try to run my test case with this PR and see benefits
   
   In theory this change shouldn't change anything currently, do you think it 
does?
   
   When running locally, I found we can make some queries a bit faster by 
coalescing adjacent ranges (this happens sometimes and saves IO requests), but 
left this for a future PR.


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