This bug was originally marked as duplicate of bug 204155, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 8.0.1 (Build 201408251540)
VM: Java HotSpot(TM) Client VM, 25.20-b23, Java(TM) SE Runtime Environment, 1.8.0_20-b26
OS: Windows 7
GUEST: LowPerformance took
Maximum slowness yet reported was 30492 ms, average is 30492
Created attachment 149606 [details]
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue.
Thanks for your cooperation,
NetBeans IDE 8.2 Release Boss