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https://issues.apache.org/jira/browse/HBASE-11444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14052619#comment-14052619
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Andrew Purtell commented on HBASE-11444:
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Attached patch compiles locally with -Dhadoop.profile=1.0 and default. Let's
see what HadoopQA says.
> Remove use of reflection for User#getShortName
> ----------------------------------------------
>
> Key: HBASE-11444
> URL: https://issues.apache.org/jira/browse/HBASE-11444
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.98.3
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Fix For: 0.99.0, 0.98.4
>
> Attachments: HBASE-11444.patch, IntegrationTestIngestWithACL.svg
>
>
> The time we spend looking up a user's short name with User#getShortName in
> hot security code paths is mostly spent in Class#getMethod, ~70%. This is
> only ~1% of overall CPU time but is the bulk of time spent in
> AccessController#prePut, for example.
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