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This bug was originally marked as duplicate of bug 171183, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.2 (Build 201207171143) VM: Java HotSpot(TM) Client VM, 23.0-b21, Java(TM) SE Runtime Environment, 1.7.0_04-b20 OS: Windows 7 Maximum slowness yet reported was 22647 ms, average is 22647
Created attachment 122739 [details] nps snapshot
As can be seen from the attached profiler snapshot, the delay is caused by extremely slow IO. However, JavaSource.runModificationTask should not be called from AWT EDT. Reassigning.
*** Bug 222134 has been marked as a duplicate of this bug. ***
Created attachment 137634 [details] nps snapshot Changing settings and closing a persistence.xml file