[GitHub] [arrow-datafusion] yahoNanJing commented on pull request #5866: Improve avg/sum Aggregator performance

Thu, 06 Apr 2023 00:02:17 -0700 


yahoNanJing commented on PR #5866:
URL: 
https://github.com/apache/arrow-datafusion/pull/5866#issuecomment-1498587761

   Hi @Dandandan, for the latest code, the **_cast_** is almost avoided. The 
related flame graphs are as follows:
   
![perf-5866](https://user-images.githubusercontent.com/90197956/230296399-78aec1e7-0d0f-448a-9454-63861cb18426.svg)
   
![perf-main](https://user-images.githubusercontent.com/90197956/230296407-662baf44-db00-44cc-b6ef-c382f09548eb.svg)
   
   With single partition benchmark, the latency is reduced from 11s to 9s for 
q17.


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