From 4da0d2a1d4d511129c2eb90a34ed3ce90a0896ac Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Wed, 5 Jun 2024 22:16:58 +0200
Subject: [PATCH] chore: speed up regex (#11918)

This regex can take longer than expected in certain situations, making it more explicit and adding "not a whitespace" to the set speeds it up
Related https://github.com/sveltejs/language-tools/issues/2363
---
 .changeset/itchy-peaches-compare.md              | 5 +++++
 packages/svelte/src/compiler/preprocess/index.js | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/itchy-peaches-compare.md

diff --git a/.changeset/itchy-peaches-compare.md b/.changeset/itchy-peaches-compare.md
new file mode 100644
index 0000000000..9f7ae884af
--- /dev/null
+++ b/.changeset/itchy-peaches-compare.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+chore: speed up regex
diff --git a/packages/svelte/src/compiler/preprocess/index.js b/packages/svelte/src/compiler/preprocess/index.js
index 9b101249a5..11cf9fdf7a 100644
--- a/packages/svelte/src/compiler/preprocess/index.js
+++ b/packages/svelte/src/compiler/preprocess/index.js
@@ -248,9 +248,9 @@ function stringify_tag_attributes(attributes) {
 }
 
 const regex_style_tags =
-	/<!--[^]*?-->|<style((?:\s+[^=>'"/]+=(?:"[^"]*"|'[^']*'|[^>\s]+)|\s+[^=>'"/]+)*\s*)(?:\/>|>([\S\s]*?)<\/style>)/g;
+	/<!--[^]*?-->|<style((?:\s+[^=>'"/\s]+=(?:"[^"]*"|'[^']*'|[^>\s]+)|\s+[^=>'"/\s]+)*\s*)(?:\/>|>([\S\s]*?)<\/style>)/g;
 const regex_script_tags =
-	/<!--[^]*?-->|<script((?:\s+[^=>'"/]+=(?:"[^"]*"|'[^']*'|[^>\s]+)|\s+[^=>'"/]+)*\s*)(?:\/>|>([\S\s]*?)<\/script>)/g;
+	/<!--[^]*?-->|<script((?:\s+[^=>'"/\s]+=(?:"[^"]*"|'[^']*'|[^>\s]+)|\s+[^=>'"/\s]+)*\s*)(?:\/>|>([\S\s]*?)<\/script>)/g;
 
 /**
  * Calculate the updates required to process all instances of the specified tag.