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https://issues.apache.org/jira/browse/SPARK-14319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15631091#comment-15631091
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Hyukjin Kwon commented on SPARK-14319:
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Hey [~sameerag], I guess we might be able to take an action to this JIRA too.
> Speed up group-by aggregates
> ----------------------------
>
> Key: SPARK-14319
> URL: https://issues.apache.org/jira/browse/SPARK-14319
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Sameer Agarwal
>
> Aggregates with key in SparkSQL are almost 30x slower than aggregates with
> key. This master JIRA tracks our attempts to optimize them.
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