[jira] [Created] (KYLIN-4666) Improve TopNCounter's merge performance

[Zhong Yanghong (Jira)]

Zhong Yanghong created KYLIN-4666:
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             Summary: Improve TopNCounter's merge performance
                 Key: KYLIN-4666
                 URL: https://issues.apache.org/jira/browse/KYLIN-4666
             Project: Kylin
          Issue Type: Improvement
            Reporter: Zhong Yanghong
            Assignee: Zhong Yanghong






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