code: function() {
  			var completed = window.app.Todos.completed().length;
  			var remaining = window.app.Todos.remaining().length;
  
  			if (window.app.Todos.length) {
  				this.$main.show();
  				this.$footer.show();
  
  				this.statsTemplate.render({
  					completed:  completed,
  					remaining:  remaining,
  					items:      (remaining == 1 ? 'item' : 'items')
  				});
  
  				this.$('#filters li a')
  					.removeClass('selected')
  					.filter("[href='#/" + (window.app.TodoFilter || "") + "']")
  					.addClass('selected');
  
  
  			} else {
  				this.$main.hide();
  				this.$footer.hide();
  			}
  
  			this.allCheckbox.checked = !remaining;
  		}
docs: Re-rendering the App just means refreshing the statistics -- the rest of the app doesn't change.