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Posted to issues@spark.apache.org by "Narine Kokhlikyan (JIRA)" <ji...@apache.org> on 2016/02/12 06:14:18 UTC
[jira] [Updated] (SPARK-13295) ML/MLLIB: AFTSurvivalRegression:
Improve AFTAggregator - Avoid creating new instances of arrays/vectors for
each record
[ https://issues.apache.org/jira/browse/SPARK-13295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Narine Kokhlikyan updated SPARK-13295:
--------------------------------------
Description:
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.
was:
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 whith 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.
> 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
>
> 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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