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When working with with the build of new projects implementation I see very poor UI responsivness. Mainly when expanding and collapsing nodes of all types in Explorer. It takes seconds to redraw of just collaps node. I took number of thread dumps.
Created attachment 7396 [details] couple thread dumps when frozen UI
Created attachment 7400 [details] most frequent traces when UI is frozen
There was a problem with project's internal URLs, our URLStreamHandler didn't override default implementation correctly to prevent it from sniffing over the network. This is already fixed. Another story is the FileSetsSelector, which allows to register looks for particular instances of DataObjects belonging to some FileSet. There is another way how this can be achived, FileSet based looks aren't supported anymore.
As described in http://www.netbeans.org/servlets/ReadMsg?msgId=619519&listName=nbdiscuss the current work on projects prototype has been stopped. Marking issue as VERIFIED --->
---> CLOSED