Build: NetBeans IDE 6.9 (Build 201006101454)
VM: Java HotSpot(TM) Client VM, 16.3-b01, Java(TM) SE Runtime Environment, 1.6.0_20-b02
OS: Windows XP
Maximum slowness yet reported was 63241 ms, average is 61155
Created attachment 100373 [details]
SQE asks to store a prefs key in a project, which then waits for the project lock. This is held for a long time by a Java EE project's view, parsing some Glassfish config file; the Windows file system is taking a very long time to respond, perhaps due to lack of working memory.
The root slowdown is probably just the usual crappy Windows I/O performance, but the blocking of the GUI is due to AuxiliaryConfigBasedPreferencesProvider trying to write out new values immediately. Unless flush() is called, it is permitted to do so asynchronously, though this could result in some race conditions.
last report is 2 years old - seems to be fixed now