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https://issues.apache.org/jira/browse/SPARK-3165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181925#comment-16181925
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Yan Facai (颜发才) commented on SPARK-3165:
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The PR proposed by me has been closed because another better solution exists.
So, welcome to take over the JIRA if you are interested in it. Thanks.
> DecisionTree does not use sparsity in data
> ------------------------------------------
>
> Key: SPARK-3165
> URL: https://issues.apache.org/jira/browse/SPARK-3165
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Joseph K. Bradley
> Priority: Minor
>
> Improvement: computation
> DecisionTree should take advantage of sparse feature vectors. Aggregation
> over training data could handle the empty/zero-valued data elements more
> efficiently.
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