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Posted to issues@spark.apache.org by "Feynman Liang (JIRA)" <ji...@apache.org> on 2015/07/21 20:03:05 UTC

[jira] [Updated] (SPARK-9224) OnlineLDAOptimizer Performance Improvements

     [ https://issues.apache.org/jira/browse/SPARK-9224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Feynman Liang updated SPARK-9224:
---------------------------------
      Priority: Major  (was: Critical)
    Issue Type: Improvement  (was: Bug)

> 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
>
> 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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