[GitHub] [arrow] westonpace commented on pull request #11616: ARROW-14577: [C++] Enable fine grained IO for async IPC reader

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westonpace commented on pull request #11616:
URL: https://github.com/apache/arrow/pull/11616#issuecomment-1007854396


   > Out of curiosity, how does this affect S3 performance? (Or simulated S3 
via Minio/toxiproxy which would probably be less variable.)
   
   Generally seems to be an improvement for S3 (S3 Local means the code was run 
in the S3 cloud so the access was local.  It seems the EC2 container's 
bandwidth was a significant limiting factor):
   
   
![s3l_new](https://user-images.githubusercontent.com/1696093/148625682-95cee6c8-903d-48d2-b63c-ca196da7c137.png)
   
![s3l_old](https://user-images.githubusercontent.com/1696093/148625686-ddb367f3-fac4-4543-9b48-2268554c6aef.png)
   
![s3_new](https://user-images.githubusercontent.com/1696093/148625687-355607be-2131-41e9-b5c6-b35af2842455.png)
   
![s3_old](https://user-images.githubusercontent.com/1696093/148625689-0125b480-bbcf-4b22-8dcc-999b1deca94f.png)
   


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