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https://issues.apache.org/jira/browse/SPARK-33518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17269176#comment-17269176
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Apache Spark commented on SPARK-33518:
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User 'zhengruifeng' has created a pull request for this issue:
https://github.com/apache/spark/pull/31279
> Improve performance of ML ALS recommendForAll by GEMV
> -----------------------------------------------------
>
> Key: SPARK-33518
> URL: https://issues.apache.org/jira/browse/SPARK-33518
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 3.1.0
> Reporter: zhengruifeng
> Assignee: zhengruifeng
> Priority: Major
> Fix For: 3.2.0
>
>
> There were a lot of works on improving ALS's {{recommendForAll}}
> For now, I found that it maybe futhermore optimized by
> 1, using GEMV;
> 2, use guava.ordering instead of BoundedPriorityQueue;
>
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