Bug 220559 Regression in some open editor performance tests
Verifying build I20080226-1155, it looks like some open editors tests are seriously red: - OpenJavaEditorTest#testOpenEditor3(): between -16.1% and -36% - OpenJavaEditorTest#testOpenEditor4(): between -18.1% and -39.2%
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
commonViewer.getControl().setRedraw(false);
			
			INavigatorFilterService filterService = commonViewer
					.getNavigatorContentService().getFilterService();
			ViewerFilter[] visibleFilters = filterService.getVisibleFilters(true);
			for (int i = 0; i < visibleFilters.length; i++) {
				commonViewer.addFilter(visibleFilters[i]);
			}
	
			commonViewer.setSorter(new CommonViewerSorter());
	
			/*
			 * make sure input is set after sorters and filters to avoid unnecessary
			 * refreshes
			 */
			commonViewer.setInput(getInitialInput()); 
	
			getSite().setSelectionProvider(commonViewer);
	
			updateTitle();
		} finally { 
			commonViewer.getControl().setRedraw(true);
		}
		/*
		 * Create the CommonNavigatorManager last because information about the
		 * state of the CommonNavigator is required for the initialization of
		 * the CommonNavigatorManager
		 */
		commonManager = createCommonManager();
		if (memento != null) {