From 7f390612a3192d944659d607a0ad71b58a612a0f Mon Sep 17 00:00:00 2001
From: Aaron O'Mullan <aaron.omullan@gmail.com>
Date: Fri, 1 Oct 2021 01:03:51 +0200
Subject: perf(web): optimize byteLowerCase() (#12282)

---
 ext/web/00_infra.js | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/ext/web/00_infra.js b/ext/web/00_infra.js
index 7098c9577..55cd69f7c 100644
--- a/ext/web/00_infra.js
+++ b/ext/web/00_infra.js
@@ -157,13 +157,9 @@
    * @returns {string}
    */
   function byteLowerCase(s) {
-    return StringPrototypeReplace(
-      String(s),
-      /[A-Z]/g,
-      function byteUpperCaseReplace(c) {
-        return StringPrototypeToLowerCase(c);
-      },
-    );
+    // NOTE: correct since all callers convert to ByteString first
+    // TODO(@AaronO): maybe prefer a ByteString_Lower webidl converter
+    return StringPrototypeToLowerCase(s);
   }
 
   /**
-- 
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