diff --git a/src/vs/base/browser/ui/tree/treeModel.ts b/src/vs/base/browser/ui/tree/treeModel.ts
index 20ede7b260c9c0bb4461264c9313be4817d8738d..cc1ad0fa8d3be94fff42e6d19e6e7f5d0a5dbd93 100644
--- a/src/vs/base/browser/ui/tree/treeModel.ts
+++ b/src/vs/base/browser/ui/tree/treeModel.ts
@@ -75,6 +75,7 @@ export interface ITreeModelOptions<T, TFilterData = void> {
 
 export class TreeModel<T, TFilterData = void> {
 
+	// TODO@joao perf!
 	static getNodeLocation<T>(node: ITreeNode<T, any>): number[] {
 		const location = [];