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When there are a lot ov displayables in the flow, it becomes very very slow. It is very hard to relayout any of the form. For my application, i have about 30 displayables. and i may wait for about one minutes to move a simple displayable to another place. also there may be some empty arrow in the air. the view of flow is very very slow.
Workaround: http://wiki.netbeans.org/FAQHowToSplitVisualMobileDesig
Problem lays in Visual Libraries. Reassigning.
most likely related to: https://netbeans.org/bugzilla/show_bug.cgi?id=183568 *** This bug has been marked as a duplicate of bug 183568 ***