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 8.0.2 (Build 201411181905)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.102-b14, Java(TM) SE Runtime Environment, 1.8.0_102-b14
OS: Windows 7
GUEST: LowPerformance took 29270 ms.
Maximum slowness yet reported was 29270 ms, average is 29270
Created attachment 163067 [details]