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https://issues.apache.org/jira/browse/SPARK-3165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-3165:
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Assignee: Apache Spark
> 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
> Assignee: Apache Spark
> 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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