From c49290a0f4d9bd3bef4d65e7db024d182056aa1c Mon Sep 17 00:00:00 2001
From: Richard Hallows <jeddy3@users.noreply.github.com>
Date: Fri, 30 Jun 2023 11:53:00 +0100
Subject: [PATCH] Fix function-url-quotes performance (#7011)

---
 .changeset/tender-apes-count.md        | 5 +++++
 lib/rules/function-url-quotes/index.js | 4 ++++
 2 files changed, 9 insertions(+)
 create mode 100644 .changeset/tender-apes-count.md

diff --git a/.changeset/tender-apes-count.md b/.changeset/tender-apes-count.md
new file mode 100644
index 0000000000..e725efc37b
--- /dev/null
+++ b/.changeset/tender-apes-count.md
@@ -0,0 +1,5 @@
+---
+"stylelint": patch
+---
+
+Fixed: `function-url-quotes` performance
diff --git a/lib/rules/function-url-quotes/index.js b/lib/rules/function-url-quotes/index.js
index b402ba7450..efe959ea44 100644
--- a/lib/rules/function-url-quotes/index.js
+++ b/lib/rules/function-url-quotes/index.js
@@ -24,6 +24,8 @@ const meta = {
 	fixable: true,
 };
 
+const URL_FUNC_REGEX = /url\(/i;
+
 /** @type {import('stylelint').Rule} */
 const rule = (primary, secondaryOptions, context) => {
 	return (root, result) => {
@@ -57,6 +59,8 @@ const rule = (primary, secondaryOptions, context) => {
 		 * @param {import('postcss').Declaration} decl
 		 */
 		function checkDeclParams(decl) {
+			if (!URL_FUNC_REGEX.test(decl.value)) return;
+
 			if (!isStandardSyntaxDeclaration(decl)) return;
 
 			const value = getDeclarationValue(decl);