Bug 64097 Loading icons always lookup the bundle
When UI and IDE are loading the icons, they are looking up the bundle for every icon they are trying to load. Looking up a bundle is not specially slow but is not the fastest operation either, therefore it could be great if you could lookup the bundle once and use it to load all the icons. Doing that will probably slightly improve the startup time.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
* @param shared <code>true</code> if this is a shared image, and
	 * <code>false</code> if this is not a shared image
	 * @see IWorkbenchConfigurer#declareImage
	 */
	private void declareWorkbenchImage(String symbolicName, String path, boolean shared) {
		URL url = null;
		try {
			URL URL_BASIC = Platform.getPlugin(IDEWorkbenchPlugin.IDE_WORKBENCH).getDescriptor().getInstallURL();
			url = new URL(URL_BASIC, path);
		} catch (MalformedURLException e) {
		    
		}
		ImageDescriptor desc = ImageDescriptor.createFromURL(url);
		getWorkbenchConfigurer().declareImage(symbolicName, desc, shared);
	}	
	
	public void fillActionBars(IWorkbenchWindow window, IActionBarConfigurer actionConfigurer, int flags) {
		
		
		WorkbenchActionBuilder actionBuilder = null;
		IWorkbenchWindowConfigurer windowConfigurer = getWorkbenchConfigurer().getWindowConfigurer(window);
		
		
		
		actionBuilder = (WorkbenchActionBuilder) windowConfigurer.getData(ACTION_BUILDER);
		if (actionBuilder == null) {
			actionBuilder = new WorkbenchActionBuilder(window);
		}
		
		if ((flags & FILL_PROXY) != 0) {