Bug 136921 [IDE] New File dialog locks for 20 seconds
I have fairly large workspace (many thousands files in 150+ projects). Whenever I try to create a new file, "New File" dialog stays locked for 15-20 seconds before I can start typing file name. CPU utilization is 100% during this time. Eclipse 3.2 I20060331-2000, WinXP SP2, tried with both IBM Java 1.5.0 SR1 and SUN 1.5.0_05.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/misc/ContainerSelectionGroup.java
private Text containerNameField;
    TreeViewer treeViewer;
    
    private static final String DEFAULT_MSG_NEW_ALLOWED = IDEWorkbenchMessages.ContainerGroup_message;
    private static final String DEFAULT_MSG_SELECT_ONLY = IDEWorkbenchMessages.ContainerGroup_selectFolder;
    
    private static final int SIZING_SELECTION_PANE_WIDTH = 320;
    private static final int SIZING_SELECTION_PANE_HEIGHT = 300;
    /**
     * Creates a new instance of the widget.
     *
     * @param parent The parent widget of the group.
     * @param listener A listener to forward events to. Can be null if
     *	 no listener is required.
     * @param allowNewContainerName Enable the user to type in a new container
     *  name instead of just selecting from the existing ones.
     */
    public ContainerSelectionGroup(Composite parent, Listener listener,
            boolean allowNewContainerName) {
        this(parent, listener, allowNewContainerName, null);
    }
    /**
     * Creates a new instance of the widget.
     *
     * @param parent The parent widget of the group.
     * @param listener A listener to forward events to.  Can be null if
     *	 no listener is required.
     * @param allowNewContainerName Enable the user to type in a new container
     *  name instead of just selecting from the existing ones.