Reynold Xin created SPARK-3861:
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Summary: Avoid rebuilding hash tables on each partition
Key: SPARK-3861
URL: https://issues.apache.org/jira/browse/SPARK-3861
Project: Spark
Issue Type: Sub-task
Reporter: Reynold Xin
Assignee: Reynold Xin
BroadcastHashJoin builds a new hash table for each partition. We can build it
once per node and reuse the hash table.
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