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https://issues.apache.org/jira/browse/SPARK-16499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15452593#comment-15452593
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Apache Spark commented on SPARK-16499:
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User 'WeichenXu123' has created a pull request for this issue:
https://github.com/apache/spark/pull/14898
> Improve applyInPlace function for matrix in ANN code
> ----------------------------------------------------
>
> Key: SPARK-16499
> URL: https://issues.apache.org/jira/browse/SPARK-16499
> Project: Spark
> Issue Type: Improvement
> Components: ML, MLlib
> Reporter: Weichen Xu
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The ApplyInPlace function in ANN code:
> `
> def apply(x: BDM[Double], y: BDM[Double], func: Double => Double): Unit
> `
> is implemented using simple while loop.
> It should be replaced with breeze BDM matrix operating function, so that it
> can take advantage of breeze lib's optimization.
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