From 21c2c01ebed902c70763bb9319c3ec48c4cb5284 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Mon, 5 Jun 2023 10:52:40 +0200
Subject: perf: optimize RegExp usage in JS (#19364)

Towards https://github.com/denoland/deno/issues/19330

Shows about 1% improvement in the HTTP benchmark.
---
 ext/webidl/00_webidl.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'ext/webidl')

diff --git a/ext/webidl/00_webidl.js b/ext/webidl/00_webidl.js
index dfaa774e2..ca1c7c606 100644
--- a/ext/webidl/00_webidl.js
+++ b/ext/webidl/00_webidl.js
@@ -59,6 +59,7 @@ const {
   ReflectHas,
   ReflectOwnKeys,
   RegExpPrototypeTest,
+  RegExpPrototypeExec,
   SafeRegExp,
   SafeSet,
   SetPrototypeEntries,
@@ -406,7 +407,7 @@ converters.DOMString = function (V, prefix, context, opts = {}) {
 const IS_BYTE_STRING = new SafeRegExp(/^[\x00-\xFF]*$/);
 converters.ByteString = (V, prefix, context, opts) => {
   const x = converters.DOMString(V, prefix, context, opts);
-  if (!RegExpPrototypeTest(IS_BYTE_STRING, x)) {
+  if (RegExpPrototypeExec(IS_BYTE_STRING, x) === null) {
     throw makeException(
       TypeError,
       "is not a valid ByteString",
-- 
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