Bug 95672 Focus changes slow when java browsing perspective open
To reproduce: 1. Run Eclipse in your favorite profiler 2. Open the Java browsing perspective 3. Profile the time taken to switch between java editors On my system, approx. 50% of the time is spent in JavaBrowsingPart.partBroughtToTop. Notice that this method continues to dominate activation changes, even when another perspective is active and no java browsing parts are visible.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingPart.java
protected final ILabelProvider getLabelProvider() {
		return fLabelProvider;
	}
	protected final ILabelProvider getTitleProvider() {
		return fTitleProvider;
	}
	/**
	 * Creates the the viewer of this part.
	 *
	 * @param parent	the parent for the viewer
	 */
	protected StructuredViewer createViewer(Composite parent) {
		return new ProblemTableViewer(parent, SWT.MULTI);
	}
	protected int getLabelProviderFlags() {
		return JavaElementLabelProvider.SHOW_BASICS | JavaElementLabelProvider.SHOW_OVERLAY_ICONS |
				JavaElementLabelProvider.SHOW_SMALL_ICONS | JavaElementLabelProvider.SHOW_VARIABLE | JavaElementLabelProvider.SHOW_PARAMETERS;
	}
	/**
	 * Adds filters the viewer of this part.
	 */
	protected void addFilters() {
		
	}
	/**
	 * Creates the the content provider of this part.
	 */
	protected IContentProvider createContentProvider() {
		return new JavaBrowsingContentProvider(true, this);
	}