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https://issues.apache.org/jira/browse/SPARK-3164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley updated SPARK-3164:
-------------------------------------
Description:
Improvement: computation
For categorical features with many categories, it could be more efficient to
store Split.categories as a Set, not a List. (It is currently a List.) A Set
might be more scalable (for log n lookups), though tests would need to be done
to ensure that Sets do not incur too much more overhead than Lists.
was:
Improvement: computation
For categorical features with many categories, it could be more efficient to
store Split.categories as a Set, not a List. (It is currently a List.) A Set
might be more scalable (for log(n) lookups), though tests would need to be done
to ensure that Sets do not incur too much more overhead than Lists.
> Store DecisionTree Split.categories as Set
> ------------------------------------------
>
> Key: SPARK-3164
> URL: https://issues.apache.org/jira/browse/SPARK-3164
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Joseph K. Bradley
> Priority: Trivial
>
> Improvement: computation
> For categorical features with many categories, it could be more efficient to
> store Split.categories as a Set, not a List. (It is currently a List.) A
> Set might be more scalable (for log n lookups), though tests would need to be
> done to ensure that Sets do not incur too much more overhead than Lists.
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