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Created attachment 155162 [details] Performance graph. Since build 201507100001 there is a regression in measured time for closing PHP project. Compared to 8.0.2 time is doubled. There are additional repaint events in explorer tree <event diff="1483" name="ADD DirtyRegion: o.o.explorer.view.TreeView$ExplorerTree/null, 0,0,510,18, AWT-EventQueue-0" time="3023580" type="app_message"/> <event diff="1486" name="ADD DirtyRegion: o.o.explorer.view.TreeView$ExplorerTree/null, 0,0,129,16, AWT-EventQueue-0" time="3023582" type="app_message"/> See attachments for performance graph and list of changes.
Created attachment 155163 [details] Changes in build 201507100001.
Jirko, any idea how to start investigating this issue please? I created a snapshot for closing project but nothing suspicious in the EDT thread. Will attach it. Also, I looked at the attachment with commits and none of my commits should cause this issue (I am not able to decide about commits of other people). Thanks.
Created attachment 155767 [details] profiler snapshot for closing PHP project
As I wrote in description there were some repaint events in explorer in project's view. Try to look for suspicious commits in that area. You can try to revert some commit and measure if it helps. Run org\netbeans\performance\languages\actions\CloseProjectTest.java in performance.scripting project.