From: Evan You <yyx990803@gmail.com>
Date: Fri, 11 Oct 2019 22:06:24 +0000 (-0400)
Subject: perf: avoid parentNode call when dynamic child is not a Fragment
X-Git-Tag: v3.0.0-alpha.0~485
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1b06b3c424a7d754aa3a118da4e391f239d5a377;p=thirdparty%2Fvuejs%2Fcore.git

perf: avoid parentNode call when dynamic child is not a Fragment
---

diff --git a/packages/runtime-core/src/createRenderer.ts b/packages/runtime-core/src/createRenderer.ts
index 2c836071ba..595b187ca8 100644
--- a/packages/runtime-core/src/createRenderer.ts
+++ b/packages/runtime-core/src/createRenderer.ts
@@ -503,7 +503,11 @@ export function createRenderer<
         patch(
           oldVNode,
           dynamicChildren[i],
-          hostParentNode(oldVNode.el!)!,
+          // in the case of a Fragment, we need to provide the actual parent
+          // of the Fragment itself so it can move its children. In other cases,
+          // the parent container is not actually used so we just pass the
+          // block element here to avoid a DOM parentNode call.
+          oldVNode.type === Fragment ? hostParentNode(oldVNode.el!)! : el,
           null,
           parentComponent,
           parentSuspense,