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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2021/01/18 06:01:38 UTC

[GitHub] [iotdb] SteveYurongSu commented on pull request #2511: [IOTDB-1113] Optimize the execution efficiency of UDF

SteveYurongSu commented on pull request #2511:
URL: https://github.com/apache/iotdb/pull/2511#issuecomment-762003229


   Performance report:
   
   Data: root.sg.d.s1, INT32, 100 000 000 points
   
   SQL | Execution Time | Ratio
   -- | -- | --
   select s1 from root.sg.d; | 19636 ms | 100%
   BEFORE OPTIMIZATION - select do_nothing(s1) from root.sg.d; | 76446 ms | 389.3%
   AFTER OPTIMIZATION - select do_nothing(s1) from root.sg.d; | 35547 ms | 180.0%
   
   After optimization, the execution time of the do_nothing function is reduced by (76446-35547) / 76446 = 53.5%.
   


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