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https://issues.apache.org/jira/browse/SPARK-9224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley resolved SPARK-9224.
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Resolution: Fixed
Fix Version/s: 1.5.0
Issue resolved by pull request 7454
[https://github.com/apache/spark/pull/7454]
> OnlineLDAOptimizer Performance Improvements
> -------------------------------------------
>
> Key: SPARK-9224
> URL: https://issues.apache.org/jira/browse/SPARK-9224
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Feynman Liang
> Assignee: Feynman Liang
> Fix For: 1.5.0
>
>
> OnlineLDAOptimizer's current implementation can be improved by using in-place
> updating (instead of reassignment to vars), reducing number of
> transpositions, and an outer product (instead of looping) to collect stats.
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