Daryn Sharp created HADOOP-13442:
------------------------------------
Summary: Optimize UGI group lookups
Key: HADOOP-13442
URL: https://issues.apache.org/jira/browse/HADOOP-13442
Project: Hadoop Common
Issue Type: Improvement
Reporter: Daryn Sharp
Assignee: Daryn Sharp
{{UGI#getGroups}} and its usage is inefficient. The list is unnecessarily
converted to multiple collections.
For _every_ invocation, the {{List<String>}} from the group provider is
converted into a {{LinkedHashSet<String>}} (to de-dup), back to a {{String[]}}.
Then callers testing for group membership convert back to a {{List<String>}}.
This should be done once to reduce allocations.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
