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After adding robustness diagrams to a UML project that add only Use Case diagrams, the performance of the IDE drop to nearly unusable. If I open a Use Case diagram the IDE responds to input, but if I open a robustness diagram I can't zoom, scroll, select items from the project tree, add new elements to the diagram, move an entity on the diagram, hell I can't do a single operation without a freeze, usually from 30 seconds to a minute long. I'm using Netbeans 6 beta 2 but have found the problem with Netbeans 6 beta 1 and Netbeans 5.5.1. Tried on two machines with same results. Both machines meet the hardware specs.
Created attachment 53335 [details] Thread dump when adding a boundry object to the diagram
Created attachment 53336 [details] Thread dump when selecting an object on the diagram
Created attachment 53337 [details] Project I was working on, could be used for testing
fixed in trunk (6.x) and visualcomponent branch
Verified in NB 6.0 / 6.0.1 using the attached project and did see the performance problem as described. Verified in the latest NB 6.1 build using the same attached project. The performance problem described in the issue is no longer reproducible.