[jira] Updated: (HARMONY-6200) [classlib][luni] - add cache for file's canonical path

["Regis Xu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-6200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Regis Xu updated HARMONY-6200:
------------------------------

    Attachment: HARMONY-6200.diff

The patch implement a simple cache for file's canonical path. The cache has fixed size and element would be expired in 10 minutes.

> [classlib][luni] - add cache for file's canonical path
> ------------------------------------------------------
>
>                 Key: HARMONY-6200
>                 URL: https://issues.apache.org/jira/browse/HARMONY-6200
>             Project: Harmony
>          Issue Type: Sub-task
>          Components: Classlib
>    Affects Versions: 5.0M9
>            Reporter: Regis Xu
>         Attachments: HARMONY-6200.diff
>
>
> File.getCanonicalPath is very time cost and is heavily used by checking file permission. But in the most of cases, the canonical path is never change, it's better to cache them to avoid calculate every time. And I found RI also has cache: File.getCanonicalPath doesn't reflect change in file system real-time.

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