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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2022/08/02 03:09:02 UTC

[GitHub] [spark] HyukjinKwon commented on pull request #37360: [SPARK-39931][PYTHON][WIP] Improve applyInPandas performance for very small groups

HyukjinKwon commented on PR #37360:
URL: https://github.com/apache/spark/pull/37360#issuecomment-1201963930

   Hm, the general idea might be fine but I think the implementation is the problem. For example, the current design is that the user defined `function` always takes one group for `pdf`. To keep this behaviour, you should send the multiple groups into one, and apply the same function multiple times for each group.


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