[jira] [Created] (YARN-4090) Make Collections.sort() more efficient in FSParent.java

[Xianyin Xin (JIRA)]

Xianyin Xin created YARN-4090:
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             Summary: Make Collections.sort() more efficient in FSParent.java
                 Key: YARN-4090
                 URL: https://issues.apache.org/jira/browse/YARN-4090
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: fairscheduler
            Reporter: Xianyin Xin


Collections.sort() consumes too much time in a scheduling round.



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