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This bug was originally marked as duplicate of bug 189300, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.2 Beta (Build 201205031832) VM: Java HotSpot(TM) 64-Bit Server VM, 20.0-b11, Java(TM) SE Runtime Environment, 1.6.0_25-b06 OS: Windows 7 Maximum slowness yet reported was 4006 ms, average is 4006
Created attachment 120436 [details] nps snapshot
The open action does a bunch of I/O from AWT thread. Possibly move outside of EDT and do most of the actions in a background thread.
Already fixed in bug 236114. Thanks for reporting. *** This bug has been marked as a duplicate of bug 236114 ***