Matei Zaharia created SPARK-2657: ------------------------------------ Summary: Use more compact data structures than ArrayBuffer in groupBy and cogroup Key: SPARK-2657 URL: https://issues.apache.org/jira/browse/SPARK-2657 Project: Spark Issue Type: Sub-task Components: Spark Core Reporter: Matei Zaharia Assignee: Matei Zaharia Fix For: 1.1.0
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