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From "Ian Boston (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-2573) Performance of AC Evaluation
Date Fri, 08 Oct 2010 12:29:32 GMT

    [ https://issues.apache.org/jira/browse/JCR-2573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12919266#action_12919266
] 

Ian Boston commented on JCR-2573:
---------------------------------

Please read the later comment in JCR-2699 as we found GC Threshold problems with the AccessControlProviderHolder
in JCR-2699

> Performance of AC Evaluation
> ----------------------------
>
>                 Key: JCR-2573
>                 URL: https://issues.apache.org/jira/browse/JCR-2573
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>    Affects Versions: 2.0.0
>            Reporter: angela
>            Assignee: angela
>             Fix For: 2.0.3, 2.1.2, 2.2.0
>
>         Attachments: acl.zip
>
>
> 1. Performance in access control evaluation
> =====================================================================
>  - main focus on
>    > read performance
>    > resource-based access control in .a.j.c/s/authorization/acl/*
>  - comparison admin vs. anonymous with full permissions
>  - comparision between shortcut and ACL-evaluation.
>  - comparison JR 1.4 vs JR 2.0 [actually i will compare Day's CRX as it already provided
>    some custom AC stuff with JR 1.4]
> 2. Potential Problems
> =====================================================================
>    I would expect the most significant problems to be found in
> a) ACLProvider#retrieveResultEntries: calculating effective ACEs
>      for each session separately.
> b) AclPermission:
>      Each instance registering an event listener in order to
>      keep the result cache up to date
> c) AclPermission:
>      Resolution form Path to Item or to nearest existing Item 

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