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.