Daryn Sharp created YARN-6681:
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Summary: Eliminate double-copy of child queues in
canAssignToThisQueue
Key: YARN-6681
URL: https://issues.apache.org/jira/browse/YARN-6681
Project: Hadoop YARN
Issue Type: Sub-task
Components: resourcemanager
Affects Versions: 2.8.0
Reporter: Daryn Sharp
Assignee: Daryn Sharp
20% of the time in {{AbstractCSQueue#canAssignToThisQueue}} is spent performing
two duplications a treemap of child queues into a list - once to test for null,
second to see if it's empty. Eliminating the dups reduces the overhead to 2%.
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