From bfe265ad31faf9e2a7df5071fe96cb0b775aa1b2 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sun, 22 Feb 2026 15:10:02 +0100
Subject: [PATCH 1/3] Use `Map.prototype.getOrInsertComputed()` in the
 `editorStats` getter

---
 src/display/annotation_storage.js | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/display/annotation_storage.js b/src/display/annotation_storage.js
index d09b56218d22a..2403fecf70bc8 100644
--- a/src/display/annotation_storage.js
+++ b/src/display/annotation_storage.js
@@ -260,13 +260,8 @@ class AnnotationStorage {
         if (key === "type") {
           continue;
         }
-        let counters = map.get(key);
-        if (!counters) {
-          counters = new Map();
-          map.set(key, counters);
-        }
-        const count = counters.get(val) ?? 0;
-        counters.set(val, count + 1);
+        const counters = map.getOrInsertComputed(key, () => new Map());
+        counters.set(val, (counters.get(val) ?? 0) + 1);
       }
     }
     if (numberOfDeletedComments > 0 || numberOfEditedComments > 0) {

From ab8e67ecff97ed70d2d2041f2f8b0f41180df0d1 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sun, 22 Feb 2026 17:54:17 +0100
Subject: [PATCH 2/3] Use `Map.prototype.getOrInsert()` in the
 `src/display/annotation_layer.js` file

---
 src/display/annotation_layer.js | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/display/annotation_layer.js b/src/display/annotation_layer.js
index e486221c10a36..dc8be6e8de42a 100644
--- a/src/display/annotation_layer.js
+++ b/src/display/annotation_layer.js
@@ -3877,12 +3877,7 @@ class AnnotationLayer {
         this.#elements.push(element);
 
         if (data.popupRef) {
-          const elements = popupToElements.get(data.popupRef);
-          if (!elements) {
-            popupToElements.set(data.popupRef, [element]);
-          } else {
-            elements.push(element);
-          }
+          popupToElements.getOrInsert(data.popupRef, []).push(element);
         }
       }
 

From c81904ac0a1bcb1597563f041a60d40d358d5090 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Sun, 22 Feb 2026 17:55:51 +0100
Subject: [PATCH 3/3] Use `Map.prototype.getOrInsertComputed()` in the
 `src/display/canvas.js` file

---
 src/display/canvas.js | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/display/canvas.js b/src/display/canvas.js
index 3b18f8098810f..94d5c496b925d 100644
--- a/src/display/canvas.js
+++ b/src/display/canvas.js
@@ -989,11 +989,10 @@ class CanvasGraphics {
           : [currentTransform.slice(0, 4), fillColor]
       );
 
-      cache = this._cachedBitmapsMap.get(mainKey);
-      if (!cache) {
-        cache = new Map();
-        this._cachedBitmapsMap.set(mainKey, cache);
-      }
+      cache = this._cachedBitmapsMap.getOrInsertComputed(
+        mainKey,
+        () => new Map()
+      );
       const cachedImage = cache.get(cacheKey);
       if (cachedImage && !isPatternFill) {
         const offsetX = Math.round(