[GitHub] [arrow] lidavidm commented on pull request #9620: ARROW-11843: [C++] Provide reentrant Parquet reader

Fri, 23 Apr 2021 10:37:16 -0700 


lidavidm commented on pull request #9620:
URL: https://github.com/apache/arrow/pull/9620#issuecomment-825811974


   Apart from the non-pre-buffered single-file case, this brings us back on par 
with or improves upon the threaded scanner.
   
   ![Median Parquet Scan Time 
(seconds)](https://user-images.githubusercontent.com/327919/115908961-d5619c80-a438-11eb-8754-06eaabd6d18d.png)
   


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