From 13ad764dd20ac1753bf609449dc26d8d15249639 Mon Sep 17 00:00:00 2001
From: hsingh <hsingh@mozilla.com>
Date: Wed, 13 Sep 2023 19:37:18 +0000
Subject: [PATCH] Bug 1853021: Fixing a potential performance regression caused
 by Bug1852071.r=janv,dom-storage-reviewers

Differential Revision: https://phabricator.services.mozilla.com/D188127
---
 dom/quota/OriginParser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dom/quota/OriginParser.cpp b/dom/quota/OriginParser.cpp
index 0fe35b1dd80a..0335b1e2c039 100644
--- a/dom/quota/OriginParser.cpp
+++ b/dom/quota/OriginParser.cpp
@@ -477,6 +477,10 @@ void OriginParser::HandleTrailingSeparator() {
 }
 
 bool IsUUIDOrigin(const nsCString& aOrigin) {
+  if (!StringBeginsWith(aOrigin, kUUIDOriginScheme)) {
+    return false;
+  }
+
   static const std::regex pattern(
       "^uuid://[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-4[0-9A-Fa-f]{3}-[89ABab"
       "][0-9A-Fa-f]{3}-[0-9A-Fa-f]{12}$");