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https://issues.apache.org/jira/browse/MYFACES-4237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Nicolucci resolved MYFACES-4237.
-------------------------------------
    Resolution: Fixed

> [perf] Performance update when checking for duplicate ids
> ---------------------------------------------------------
>
>                 Key: MYFACES-4237
>                 URL: https://issues.apache.org/jira/browse/MYFACES-4237
>             Project: MyFaces Core
>          Issue Type: Improvement
>          Components: JSR-372
>    Affects Versions: 2.2.12, 2.3.1
>            Reporter: Paul Nicolucci
>            Assignee: Paul Nicolucci
>            Priority: Minor
>             Fix For: 2.2.13, 2.3.2
>
>
> In 
> org/apache/myfaces/view/facelets/compiler/CheckDuplicateIdFaceletUtils.java 
> we currently do the following:
> {code:java}
> if (existingIds.contains (id)) {
> ....
> }
> {code}
> We can increase performance by doing the following:
> {code:java}
> if (!existingIds.add (id)) {
> ....
> }
> {code}



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