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https://jira.codehaus.org/browse/MRESOURCES-155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=287257#comment-287257
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Ittay Dror commented on MRESOURCES-155:
---------------------------------------

Another alternative is to create a signature for both timestamp and the 
filtering properties (e.g., create sha1 from heir string representation). then 
put a file with this signature in the target folder. on build, if the signature 
is different, re-run copy&filter and update the signature.
                
> Add an option to NOT copy resources if the source haven't changed, even 
> though the filtering is ON
> --------------------------------------------------------------------------------------------------
>
>                 Key: MRESOURCES-155
>                 URL: https://jira.codehaus.org/browse/MRESOURCES-155
>             Project: Maven 2.x Resources Plugin
>          Issue Type: Improvement
>          Components: copy, filtering
>            Reporter: Liya Katz
>
> Coping resources during incremental build on big projects affects performance 
> dramatically.
> It should be an option to stop coping filtered resources when the source is 
> not newer than the target, just like in case of resources that were not 
> filtered. 

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