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https://issues.apache.org/jira/browse/SPARK-11420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiangrui Meng resolved SPARK-11420.
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Resolution: Fixed
Fix Version/s: 1.6.0
> Updating Stddev support with Imperative Aggregate
> -------------------------------------------------
>
> Key: SPARK-11420
> URL: https://issues.apache.org/jira/browse/SPARK-11420
> Project: Spark
> Issue Type: Sub-task
> Components: ML, SQL
> Reporter: Jihong MA
> Assignee: Jihong MA
> Fix For: 1.6.0
>
>
> based on the performance comparison of Declaritive vs. Imperative Aggregate
> (SPARK-10953), switching to Imerative aggregate for stddev.
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