From 59cd4568b29aba53a11f2240518d356db3042361 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Tue, 4 Aug 2026 11:46:47 +0200
Subject: [PATCH] Cache the entire scand regular expression, in
 `src/scripting_api/util.js`

Rather than only caching a string and then re-creating the regular expression on every `Util.prototype._scand` invocation, the entire regular expression can be cached directly instead.
---
 src/scripting_api/util.js | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/scripting_api/util.js b/src/scripting_api/util.js
index 7ee8dd618..a5d3d2ac8 100644
--- a/src/scripting_api/util.js
+++ b/src/scripting_api/util.js
@@ -602,7 +602,7 @@ class Util extends PDFObject {
         : pattern;
     });
 
-    return [re, actions];
+    return [new RegExp(`^${re}$`, "g"), actions];
   }
 
   _scand(cFormat, cDate, strict = false) {
@@ -622,12 +622,10 @@ class Util extends PDFObject {
         return this.scand("m/d/yy h:MM:ss tt", cDate);
     }
 
-    const [re, actions] = (this.#scandCache ??= new Map()).getOrInsertComputed(
-      cFormat,
-      this.#createScandDataBound
-    );
+    const [regex, actions] = (this.#scandCache ??=
+      new Map()).getOrInsertComputed(cFormat, this.#createScandDataBound);
 
-    const matches = new RegExp(`^${re}$`, "g").exec(cDate);
+    const matches = regex.exec(cDate);
     if (!matches || matches.length !== actions.length + 1) {
       return strict ? null : this.#tryToGuessDate(cFormat, cDate);
     }