Update NodePaths only in built-in resources

editor/scene_tree_dock.cpp

@@ -1812,8 +1812,6 @@ bool SceneTreeDock::_check_node_path_recursive(Node *p_root_node, Variant &r_var
 			}
 		} break;
 
-// FIXME: This approach causes a significant performance regression, see GH-84910.
-#if 0
 		case Variant::OBJECT: {
 			Resource *resource = Object::cast_to<Resource>(r_variant);
 			if (!resource) {
@@ -1825,6 +1823,11 @@ bool SceneTreeDock::_check_node_path_recursive(Node *p_root_node, Variant &r_var
 				break;
 			}
 
+			if (!resource->is_built_in()) {
+				// For performance reasons, assume that scene paths are no concern for external resources.
+				break;
+			}
+
 			List<PropertyInfo> properties;
 			resource->get_property_list(&properties);
 
@@ -1841,9 +1844,7 @@ bool SceneTreeDock::_check_node_path_recursive(Node *p_root_node, Variant &r_var
 					undo_redo->add_undo_property(resource, propertyname, old_variant);
 				}
 			}
-			break;
-		};
-#endif
+		} break;
 
 		default: {
 		}