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Beginning of action: User double clicks file, or select Open action using menu or key command -- editor is already open, showing other files. Initial Feedback: Focus shifts to editor (or whatever is appropriate) Maximum time allowed: 100 ms Completion: File contents appear in editor (incomplete is ok) Maximum time allowed: 1000 ms Opening a form file is especially slow - see special issue 27183.
I think this is already tracked in issue 27710. *** This issue has been marked as a duplicate of 27710 ***