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This bug was originally marked as duplicate of bug 210576, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build 20120702-588b678dd4f2) VM: Java HotSpot(TM) 64-Bit Server VM, 20.8-b03, Java(TM) SE Runtime Environment, 1.6.0_33-b03 OS: Windows 7 Maximum slowness yet reported was 3451 ms, average is 3451
Created attachment 121779 [details] nps snapshot
One call to org.netbeans.core.windows.actions.CloseAllButThisAction.run() 100.0 3 222 ms (100%) 3 222 ms 1 leads to 18 calls to org.netbeans.core.multiview.MultiViewCloneableTopComponent.getPersistenceType() 80.01399 2 578 ms (80%) 2 578 ms 18 Probably caused by fix to bug 212993. Calling containsKey is not efficient.
*** This bug has been marked as a duplicate of bug 216454 ***