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https://issues.apache.org/jira/browse/SPARK-13295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiangrui Meng resolved SPARK-13295.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11179
[https://github.com/apache/spark/pull/11179]
> ML/MLLIB: AFTSurvivalRegression: Improve AFTAggregator - Avoid creating new
> instances of arrays/vectors for each record
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-13295
> URL: https://issues.apache.org/jira/browse/SPARK-13295
> Project: Spark
> Issue Type: Improvement
> Components: ML, MLlib
> Reporter: Narine Kokhlikyan
> Fix For: 2.0.0
>
>
> As also mentioned/marked by TODO in AFTAggregator.AFTAggregator.add(data:
> AFTPoint) a new array is being created for intercept value and it is being
> concatenated
> with another array which contains the betas, the resulted Array is being
> converted into a Dense vector which in it's turn is being converted into
> breeze vector.
> This is expensive and not necessarily beautiful.
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