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When the user invoke "Clean & Build" action on a Visual web project, the design time system resets the ClassLoader to include the recent changes in the build directory in to the ClassLoader. This causes refreshing of models (opened pages). While this is highly desirable, since it solves a major problem of "Closing and Opening the project" after adding a class to the project or modifying variable/property/method of a class for the binding dialog to pick it up correctly, it causes performance problems. Several customers complained about it and couple of users are hesitant to move to NB 6.0, because of this problem. Even though in 6.1 the performance issue due to this is less pronounced than NB 6.0, there may be ways to improve the performance. Look at some possible solutions such as - Provide some way to switch of this functionality from options dialog (with a warning of consequences) - Provide a modal dialog and display the reason for the pause - Improve TagSupport in FacesContainer (may not be necessary to reparse) - Do we really need to re-init FacesContainer?
Customer has filed a P1. *** This issue has been marked as a duplicate of 126879 ***