Wenchen Fan created SPARK-6138:
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Summary: Enhance the `toArray` method in `SizeTrackingVector`
Key: SPARK-6138
URL: https://issues.apache.org/jira/browse/SPARK-6138
Project: Spark
Issue Type: Improvement
Components: Spark Core
Reporter: Wenchen Fan
Priority: Minor
Use array copy instead of `Iterator#toArray` to make it more efficient.
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