[GitHub] [arrow] lidavidm commented on pull request #9656: ARROW-11772: [C++] Provide reentrant IPC file reader

[GitBox]

lidavidm commented on pull request #9656:
URL: https://github.com/apache/arrow/pull/9656#issuecomment-824299557


   After rebasing and hooking into Datasets, it seems this is no longer an easy 
win - need to dig into what happened. Fortunately, it also looks like 4.0's 
performance will at least be comparable to 3.0.
   
   ![S3 Median Scan Time 
(seconds)(1)](https://user-images.githubusercontent.com/327919/115609225-48420a80-a2b5-11eb-851b-fe71b6104905.png)
   


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