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https://issues.apache.org/jira/browse/NETBEANS-6179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17440456#comment-17440456
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Scott Palmer commented on NETBEANS-6179:
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Yes, this also happens with Windows LaF and when running with JDK 16.

> Open Project dialog can take over 30 seconds to appear on Windows.
> ------------------------------------------------------------------
>
>                 Key: NETBEANS-6179
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-6179
>             Project: NetBeans
>          Issue Type: Bug
>          Components: ide - Performance
>         Environment: Wndows10 Pro
> Java 17.0.1 (Zulu + JavaFX)
> NetBeans 12.6-rc2 (and earlier)
>            Reporter: Scott Palmer
>            Priority: Major
>              Labels: performance
>         Attachments: NetBeans126_OpenProject.nps, NetBeans126_OpenProject2.nps
>
>
> On Windows systems with disconnected mapped network drives, the "Open 
> Project" dialog can take over 30 seconds to appear.  The "Open File" dialog 
> does not suffer from this issue.
> While attempts to actually access the unavailable network drives can 
> logically lead to timeouts, since the open Project dialog will initially be 
> browsing in folder unrelated to the disconnected drive letters, there is no 
> reason that they should be holding up the initialization of the dialog.
> VisualVM snapshot data collected while triggering and waiting for the Open 
> Project dialog is attached.



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