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Posted to issues@spark.apache.org by "Jihong MA (JIRA)" <ji...@apache.org> on 2015/10/30 07:33:28 UTC

[jira] [Created] (SPARK-11420) Changing Stddev support with Imperative Aggregate

Jihong MA created SPARK-11420:
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             Summary: Changing Stddev support with Imperative Aggregate
                 Key: SPARK-11420
                 URL: https://issues.apache.org/jira/browse/SPARK-11420
             Project: Spark
          Issue Type: Improvement
          Components: ML, SQL
            Reporter: Jihong MA


based on the performance comparison of Declaritive vs. Imperative Aggregate (SPARK-10953), switching to Imerative aggregate for stddev. 



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