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https://issues.apache.org/jira/browse/IVY-1176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973249#action_12973249
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subes commented on IVY-1176:
----------------------------

Ok, I've found a better way to remove this performance issue.

I just check the md5sums of my generated classpath files. If the file changed, 
the deps changed... :)

> Problem with resolve (ivy.deps.changed) and timestamp of ivy.xml of 
> dependencies
> --------------------------------------------------------------------------------
>
>                 Key: IVY-1176
>                 URL: https://issues.apache.org/jira/browse/IVY-1176
>             Project: Ivy
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.1.0
>            Reporter: subes
>            Priority: Blocker
>
> Hi,
> I am having the same Issue as Jan Vissers on the mailing list:
> http://mail-archives.apache.org/mod_mbox/ant-ivy-user/200803.mbox/%[email protected]%3e
> http://mail-archives.apache.org/mod_mbox/ant-ivy-user/200803.mbox/%[email protected]%3e
> The problem is, ivy.deps.changed does not get set to true if the timestamp of 
> the dependencies ivy.xml got updated.
> The call to resolve actually tells me that the new files got downloaded 
> (because of the updated timestamp), but ivy.deps.changed tells me that the 
> artifacts did not change.
> [ivy:resolve]         
> ---------------------------------------------------------------------
> [ivy:resolve]         |                  |            modules            ||   
> artifacts   |
> [ivy:resolve]         |       conf       | number| search|dwnlded|evicted|| 
> number|dwnlded|
> [ivy:resolve]         
> ---------------------------------------------------------------------
> [ivy:resolve]         |      default     |   26  |   1   |   1   |   0   ||   
> 26  |   1   |
> [ivy:resolve]         |       tests      |   3   |   1   |   1   |   0   ||   
> 3   |   1   |
> [ivy:resolve]         |      sources     |   10  |   1   |   1   |   0   ||   
> 10  |   1   |
> [ivy:resolve]         
> ---------------------------------------------------------------------
> --> ivy.deps.changed is "false"
> This behaviour makes ivy.deps.changed mostly useless for me to implement a 
> lazy build mechanism in a multi module project.

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