From 885a74047052ddce9f03dd8e0478de9b51b84bd4 Mon Sep 17 00:00:00 2001
From: Kevin Jahns <kevin.jahns@protonmail.com>
Date: Thu, 15 Jun 2023 13:09:30 +0200
Subject: [PATCH] heavily improve performance when there are many events

---
 src/utils/YEvent.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/utils/YEvent.js b/src/utils/YEvent.js
index ac877bc5..8aafd94f 100644
--- a/src/utils/YEvent.js
+++ b/src/utils/YEvent.js
@@ -44,6 +44,10 @@ export class YEvent {
      * @type {null | Array<{ insert?: string | Array<any> | object | AbstractType<any>, retain?: number, delete?: number, attributes?: Object<string, any> }>}
      */
     this._delta = null
+    /**
+     * @type {Array<string|number>|null}
+     */
+    this._path = null
   }
 
   /**
@@ -60,8 +64,7 @@ export class YEvent {
    *   type === event.target // => true
    */
   get path () {
-    // @ts-ignore _item is defined because target is integrated
-    return getPathTo(this.currentTarget, this.target)
+    return this._path || (this._path = getPathTo(this.currentTarget, this.target))
   }
 
   /**