Bug 37884 Show Type hierarchy scalability problem
corner case but... 1) Open Object 2) select toString in the editor 3) ctrl-t 4) type T to filter the list ->this takes minutes The filtering is done after every keystroke. A first improvement is to do the refiltering after a time out. Another solution is to use the separate thread solution as is done in the ElementListSelectionDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/AbstractInformationControl.java
fTreeViewer.refresh();
				fTreeViewer.expandAll();
				selectFirstMatch();
				fTreeViewer.getControl().setRedraw(true);
			}
		});
	}
	
	protected Object getSelectedElement() {
		return ((IStructuredSelection)fTreeViewer.getSelection()).getFirstElement();
	}
	private void gotoSelectedElement() {
		Object selectedElement= getSelectedElement();
		if (selectedElement != null) {
			try {
				dispose();
				OpenActionUtil.open(selectedElement, true);
			} catch (CoreException ex) {
				JavaPlugin.log(ex);
			}
		}
	}
	/**
	 * Selects the first element in the tree which
	 * matches the current filter pattern.
	 */
	private void selectFirstMatch() {
		Tree tree= fTreeViewer.getTree();
		Object element= findElement(tree.getItems());
		if (element != null)