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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/01/20 10:51:38 UTC

[GitHub] [arrow] Dandandan edited a comment on pull request #9271: ARROW-11300: [Rust][DataFusion] Further performance improvements on hash aggregation with small groups [WIP]

Dandandan edited a comment on pull request #9271:
URL: https://github.com/apache/arrow/pull/9271#issuecomment-763517408


   ![image](https://user-images.githubusercontent.com/163737/105164296-42515780-5b15-11eb-87f0-a042c4287514.png)
   
   @jorgecarleitao while the code is quite a bit faster already, it seems `Array.slice` doesn't really do a zero-copy as promised in the doc (and accounts for about 11% of the total instructions of the program). Maybe you have an idea what could be going on here?


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