wgtmac commented on PR #35455:
URL: https://github.com/apache/arrow/pull/35455#issuecomment-1590313850

   > @wgtmac could you elaborate on how you are achieving 2X~4X acceleration of 
reading the column chunk from the cloud object store you mentioned above? Are 
you reading the column chunk page by page?
   
   In short, collect all offset/length ranges of required pages, then coalesce 
them into reasonable I/O chunks and issue async reads before reading any page.


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