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https://issues.apache.org/jira/browse/SPARK-27777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-27777.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 24648
[https://github.com/apache/spark/pull/24648]
> Eliminate uncessary sliding job in AreaUnderCurve
> -------------------------------------------------
>
> Key: SPARK-27777
> URL: https://issues.apache.org/jira/browse/SPARK-27777
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 3.0.0
> Reporter: zhengruifeng
> Assignee: zhengruifeng
> Priority: Minor
> Fix For: 3.0.0
>
>
> Current impl of \{AreaUnderCurve} use \{SlidingRDD} to perform sliding, in
> which a prepending job is needed to compute the head items on each partition.
> However, this job can be eliminated in computation of AUC by collecting local
> areas and head/last at once.
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