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Build: NetBeans IDE 7.0.1 (Build 201107282000) VM: Java HotSpot(TM) Client VM, 17.1-b03, Java(TM) SE Runtime Environment, 1.6.0_22-b04 OS: Windows XP Maximum slowness yet reported was 21454 ms, average is 13678
Created attachment 109946 [details] nps snapshot
Created attachment 116961 [details] screenshot 1
Created attachment 116962 [details] screenshot2
see screenshots, from what I can tell, a lot of time is spent in OS level IO operations, there is not a clear hot spot in terms of netbeans codebase. in my opinion the slowness was caused by something outside of netbeans, either something was wrong with the computer or some other application was taking up the io cycles.
There are a bunch more recent duplicates. In my case there was nothing else going on in the system, and the IDE was responsive until I tried to open the Options dialog.
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