This bug was originally marked as duplicate of bug 170191, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE Dev (Build 201309090001)
VM: Java HotSpot(TM) Client VM, 23.25-b01, Java(TM) SE Runtime Environment, 1.7.0_25-b17
OS: Windows XP
williambacchi: editing java code
Maximum slowness yet reported was 8219 ms, average is 8219
Created attachment 139840 [details]
Report from old NetBeans version. Due to code changes since it was reported likely not reproducible now. Feel free to reopen if happens in 8.0.2 or 8.1.