[jira] [Created] (FLINK-20757) Optimize data broadcast for sort-merge shuffle

[Shang Yuanchun (Jira)]

Yingjie Cao created FLINK-20757:
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             Summary: Optimize data broadcast for sort-merge shuffle
                 Key: FLINK-20757
                 URL: https://issues.apache.org/jira/browse/FLINK-20757
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Network
    Affects Versions: 1.12.0
            Reporter: Yingjie Cao
             Fix For: 1.13.0


For data broadcast, we can only copy the record once when writing data into SortBuffer. Besides, we can write only one copy of data when spilling data into disk. These optimizations can improve the performance of data broadcast.



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