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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2014/07/04 21:05:35 UTC

[jira] [Issue Comment Deleted] (HBASE-11444) Remove use of reflection for User#getShortName

     [ https://issues.apache.org/jira/browse/HBASE-11444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell updated HBASE-11444:
-----------------------------------

    Comment: was deleted

(was: As an alternative half-measure, I wonder if we can cache the resolved implementation class and method handles after the first lookup. )

> Remove use of reflection for User#getShortName
> ----------------------------------------------
>
>                 Key: HBASE-11444
>                 URL: https://issues.apache.org/jira/browse/HBASE-11444
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>             Fix For: 0.99.0
>
>         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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