From 2488a6a1e9779f0cca4a64163ef44ac30530a450 Mon Sep 17 00:00:00 2001
From: Sebastian Speitel <sebastian.speitel@outlook.de>
Date: Tue, 30 Mar 2021 11:36:46 +0200
Subject: [PATCH] perf: preinitialize typeCheck RegExp (#10990)

---
 src/core/util/props.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/util/props.js b/src/core/util/props.js
index 26a76664ccc..f81bad37fa1 100644
--- a/src/core/util/props.js
+++ b/src/core/util/props.js
@@ -174,13 +174,15 @@ function assertType (value: any, type: Function): {
   }
 }
 
+const functionTypeCheckRE = /^\s*function (\w+)/
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  const match = fn && fn.toString().match(/^\s*function (\w+)/)
+  const match = fn && fn.toString().match(functionTypeCheckRE)
   return match ? match[1] : ''
 }