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https://issues.apache.org/jira/browse/SPARK-11439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14990273#comment-14990273
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Nakul Jindal commented on SPARK-11439:
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Yes, this sounds good. Also, for the sake of uniformity, it would make sense to
convert the other blas.ddot call to the one from BLAS.scala.
> Optiomization of creating sparse feature without dense one
> ----------------------------------------------------------
>
> Key: SPARK-11439
> URL: https://issues.apache.org/jira/browse/SPARK-11439
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Kai Sasaki
> Priority: Minor
>
> Currently, sparse feature generated in {{LinearDataGenerator}} needs to
> create dense vectors once. It is cost efficient to prevent from generating
> dense feature when creating sparse features.
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