[ https://issues.apache.org/jira/browse/SPARK-43232 ]
Kristopher Kane deleted comment on SPARK-43232:
-----------------------------------------
was (Author: kristopherkane):
Yes, a college pointed out last night that I had missed that in the window spec.
> Improve ObjectHashAggregateExec performance for high cardinality
> ----------------------------------------------------------------
>
> Key: SPARK-43232
> URL: https://issues.apache.org/jira/browse/SPARK-43232
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.5.0
> Reporter: XiDuo You
> Priority: Major
>
> The `ObjectHashAggregateExec` has three preformance issues:
> - heavy overhead of scala sugar in `createNewAggregationBuffer`
> - unnecessary grouping key comparation after fallback to sort based
> aggregator
> - the aggregation buffer in sort based aggregator is not reused for all rest
> rows
>
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