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The DataObjectFileSet listens on events fired from DataLoader pool (OperationListener) and refreshes links when event is received. It degrades performance of whole system especialy when handling the operationPostCreate event. This event is usually fired from DataFolder-recognizer thread and DOFSet refresh slows down recognition of folder's children which is used everywhere in the IDE.
*** This issue has been marked as a duplicate of 28124 ***
verified
As described in http://www.netbeans.org/servlets/ReadMsg?msgId=619519&listName=nbdiscuss the current work on projects prototype has been stopped. Marking issue as CLOSED.