From 53463619e5d19d35dfad1a4245a8dc583681feb3 Mon Sep 17 00:00:00 2001
From: ZhangJan <dsonet@msn.com>
Date: Wed, 30 Aug 2017 17:30:09 +0800
Subject: [PATCH] perf: deep clone slot vnodes on re-render (#6478)

avoid unnecessary assignment.
---
 src/core/vdom/vnode.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/vdom/vnode.js b/src/core/vdom/vnode.js
index 751e1414bf..b58664cdc7 100644
--- a/src/core/vdom/vnode.js
+++ b/src/core/vdom/vnode.js
@@ -95,8 +95,8 @@ export function cloneVNode (vnode: VNode, deep?: boolean): VNode {
   cloned.key = vnode.key
   cloned.isComment = vnode.isComment
   cloned.isCloned = true
-  if (deep) {
-    cloned.children = vnode.children && cloneVNodes(vnode.children)
+  if (deep && vnode.children) {
+    cloned.children = cloneVNodes(vnode.children)
   }
   return cloned
 }