Weichen Xu created SPARK-17050:
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Summary: Improve initKMeansParallel with treeAggregate
Key: SPARK-17050
URL: https://issues.apache.org/jira/browse/SPARK-17050
Project: Spark
Issue Type: Improvement
Reporter: Weichen Xu
The `initKMeansParallel` use `rdd.aggregate`, it is better to use
`treeAggregate` to get better performance.
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