This issue was reported manually by misterm.
It already has 2 duplicates
Build: NetBeans IDE Dev (Build 20130108-3bf392aa2ad4)
VM: Java HotSpot(TM) 64-Bit Server VM, 21.1-b02, Java(TM) SE Runtime Environment, 1.7.0_01-b08
OS: Windows 7
darbie: Was doing a refactoring of a class name.
Maximum slowness yet reported was 4437 ms, average is 3829
Created attachment 140384 [details]
Slowness is cause by class loading, unfortunately I can't do anything with that. There is only one occurrence from last versions -> WONTFIX