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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/05/01 06:35:57 UTC

[GitHub] [arrow] eelxpeng commented on pull request #12055: ARROW-11989: [C++][Python] Improve ChunkedArray's complexity for the access of elements

eelxpeng commented on PR #12055:
URL: https://github.com/apache/arrow/pull/12055#issuecomment-1114148018

   Not sure about why. I have a large arrow file with 115545630 rows and 488 chunks. Even using the fix in this pr, the time to randomly access 1000 rows is 2102 seconds. While if I re-process the arrow file to make it 115545630 rows and 1 chunk, the time is 72 seconds. The difference is huge.


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