[GitHub] [james-project] quantranhong1999 commented on pull request #997: JAMES-3765: Improve some IMAP commands (STORE, COPY, MOVE) performance

Mon, 23 May 2022 21:24:46 -0700 


quantranhong1999 commented on PR #997:
URL: https://github.com/apache/james-project/pull/997#issuecomment-1135390094

   ## Audit massive operation performance
   
   ### 12k messages, 50 batch size, no change (master branch)
   
![image.png](https://images.zenhubusercontent.com/5f7fe3b8b67a756e7c63d181/e8f80359-1835-45f0-b638-1dc926349330)
   
   ### 12k messages, 50 batch size, flatMap change only (+ concatMap for rename)
   
![image.png](https://images.zenhubusercontent.com/5f7fe3b8b67a756e7c63d181/21df9139-6743-40dd-8016-2c2996fe2067)
   
   ### 12k messages, 50 batch size, flatMap and BatchStatement change (+ 
concatMap for rename)
   
![image.png](https://images.zenhubusercontent.com/5f7fe3b8b67a756e7c63d181/e5b30183-760f-4e08-acfe-15e65f3d480a)
   
   ### 12k messages, 20000 batch size, flatMap and BatchStatement change (+ 
concatMap for rename)
   
![image.png](https://images.zenhubusercontent.com/5f7fe3b8b67a756e7c63d181/af258731-ac97-4d78-8512-e4a7a1428c2a)
   
   
   As we can see from the results, this PR effort leads to a significant boost 
in IMAP SELECT, STORE, COPY, and MOVE commands.
   
   A degradation on RENAME command (concatMap) =>  rollbacked to flatMap for 
RENAME (agreed above).
   


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