From c896ba2e1949047ce9a46f1aca27f30632911eb4 Mon Sep 17 00:00:00 2001
From: Aaron O'Mullan <aaron.omullan@gmail.com>
Date: Wed, 29 Sep 2021 18:06:29 +0200
Subject: [PATCH] perf(webidl/DOMString): don't wrap string primitives (#12266)

---
 ext/webidl/00_webidl.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/ext/webidl/00_webidl.js b/ext/webidl/00_webidl.js
index 88384406a2..d5bad4f158 100644
--- a/ext/webidl/00_webidl.js
+++ b/ext/webidl/00_webidl.js
@@ -359,11 +359,11 @@
   };
 
   converters.DOMString = function (V, opts = {}) {
-    if (opts.treatNullAsEmptyString && V === null) {
+    if (typeof V === "string") {
+      return V;
+    } else if (V === null && opts.treatNullAsEmptyString) {
       return "";
-    }
-
-    if (typeof V === "symbol") {
+    } else if (typeof V === "symbol") {
       throw makeException(
         TypeError,
         "is a symbol, which cannot be converted to a string",