Github user WeichenXu123 commented on the issue: https://github.com/apache/spark/pull/20806 @viirya ok. but there're already a class in ML use `TypedImperativeAggregator`, see `Summarizer`. And do you benchmark and compare this PR and `df.rdd.treeAggregate`? Seems they're almost the same. Is there some difference which can make remarkable performance improvement ?
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org