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Date: Fri, 6 Apr 2012 13:37:23 +0000 (UTC)
From: "Richard S. Hall (Commented) (JIRA)" <jira@apache.org>
To: dev@felix.apache.org
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Subject: [jira] [Commented] (FELIX-3447) Optimize read only collections by
 using a specific class and not a wrapper which is slower
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    [ https://issues.apache.org/jira/browse/FELIX-3447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248339#comment-13248339 ] 

Richard S. Hall commented on FELIX-3447:
----------------------------------------

Just curious as to whether you have some empirical evidence that this is an issue or if you are just guessing? It would be nice to see a comparison.
                
> Optimize read only collections by using a specific class and not a wrapper which is slower
> ------------------------------------------------------------------------------------------
>
>                 Key: FELIX-3447
>                 URL: https://issues.apache.org/jira/browse/FELIX-3447
>             Project: Felix
>          Issue Type: Improvement
>          Components: Framework
>    Affects Versions: framework-4.0.2
>            Reporter: Guillaume Nodet
>             Fix For: framework-4.2.0
>
>         Attachments: FELIX-3447.patch
>
>
> The unmodifiable collection wrappers  are .. wrappers and as such add a slight overhead.
> In the case of felix, the resolution process does use a lot of those maps for bundle  capabilities and requirements and the overhead tends to become non negligible.

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