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/websocket/01_websocket.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'ext/websocket/01_websocket.js')

diff --git a/ext/websocket/01_websocket.js b/ext/websocket/01_websocket.js
index f7dd516ff..c4c686b9c 100644
--- a/ext/websocket/01_websocket.js
+++ b/ext/websocket/01_websocket.js
@@ -33,7 +33,7 @@ const {
   ObjectDefineProperties,
   ObjectPrototypeIsPrototypeOf,
   PromisePrototypeThen,
-  RegExpPrototypeTest,
+  RegExpPrototypeExec,
   SafeSet,
   SetPrototypeGetSize,
   // TODO(lucacasonato): add SharedArrayBuffer to primordials
@@ -256,7 +256,8 @@ class WebSocket extends EventTarget {
     if (
       ArrayPrototypeSome(
         protocols,
-        (protocol) => !RegExpPrototypeTest(HTTP_TOKEN_CODE_POINT_RE, protocol),
+        (protocol) =>
+          RegExpPrototypeExec(HTTP_TOKEN_CODE_POINT_RE, protocol) === null,
       )
     ) {
       throw new DOMException(
-- 
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