This issue was reported manually by szmitek.
It already has 1 duplicates
Build: NetBeans IDE Dev (Build nbms-and-javadoc-10156-on-20130124)
VM: Java HotSpot(TM) 64-Bit Server VM, 23.6-b04, Java(TM) SE Runtime Environment, 1.7.0_10-b18
OS: Windows 8
szmitek: Trying to edit Java code JSP page with HTML
Maximum slowness yet reported was 20381 ms, average is 20381
Created attachment 130696 [details]
As can be seen from the attached profiler snapshot most of the time is spent waiting for slow class loading and other IO operations.