[jira] [Commented] (MYFACES-4225) [perf] Cache whether a library exists in ExternalContextResourceLoader

["Thomas Andraschko (JIRA)" <de...@myfaces.apache.org>]

    [ https://issues.apache.org/jira/browse/MYFACES-4225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16437493#comment-16437493 ] 

Thomas Andraschko commented on MYFACES-4225:
--------------------------------------------

Could you provide a patch? Would be great!

> [perf] Cache whether a library exists in ExternalContextResourceLoader
> ----------------------------------------------------------------------
>
>                 Key: MYFACES-4225
>                 URL: https://issues.apache.org/jira/browse/MYFACES-4225
>             Project: MyFaces Core
>          Issue Type: Improvement
>    Affects Versions: 2.2.11
>            Reporter: Christian Beikov
>            Priority: Major
>
> I'm seeing many {{sun.nio.fs.UnixException}}s being thrown in the underlying code because {{ExternalContextResourceLoader.libraryExists}} calls {{ExternalContext.getResource}} which in the end checks if a file exists on the FS. I'd suggest when the project stage is PRODUCTION, this should be cached. Maybe this could be done by installing an \{{ExternalContextWrapper}} that caches all resource lookups? I just see that parsing a XHTML causes many exceptions to be thrown internally which negatively affects performance.



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