DevTools: Remove recursion in ProfileTreeModel._calculateTotals

third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js
index 5ceb738dea1fd3d800b7b1685e409932dc1989c8..b8206f4e4d0e159a5fd14aacbc9ba1a4d0edfb64 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/ProfileTreeModel.js
@@ -73,8 +73,8 @@ WebInspector.ProfileNode.prototype = {
 WebInspector.ProfileTreeModel = function(root)
 {
     this.root = root;
-    this.total = this._calculateTotals(this.root);
     this._assignDepthsAndParents();
+    this.total = this._calculateTotals(this.root);
 }
 
 WebInspector.ProfileTreeModel.prototype = {
@@ -103,12 +103,23 @@ WebInspector.ProfileTreeModel.prototype = {
     },
 
     /**
-     * @param {!WebInspector.ProfileNode} node
+     * @param {!WebInspector.ProfileNode} root
      * @return {number}
      */
-    _calculateTotals: function(node)
+    _calculateTotals: function(root)
     {
-        node.total = node.children.reduce((acc, child) => acc + this._calculateTotals(child), node.self);
-        return node.total;
+        var nodesToTraverse = [root];
+        var dfsList = [];
+        while (nodesToTraverse.length) {
+            var node = nodesToTraverse.pop();
+            node.total = node.self;
+            dfsList.push(node);
+            nodesToTraverse.push(...node.children);
+        }
+        while (dfsList.length > 1) {
+            var node = dfsList.pop();
+            node.parent.total += node.total;
+        }
+        return root.total;
     }
 }