From ce6f2ff88cbb648ff48330a0040ccd3016808f30 Mon Sep 17 00:00:00 2001
From: David Luzar <luzar.david@gmail.com>
Date: Fri, 22 May 2020 19:15:16 +0200
Subject: [PATCH] cache nonDeleted elements (#1626)

---
 src/scene/globalScene.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/scene/globalScene.ts b/src/scene/globalScene.ts
index 1f521a8c..3be47430 100644
--- a/src/scene/globalScene.ts
+++ b/src/scene/globalScene.ts
@@ -13,6 +13,7 @@ export interface SceneStateCallbackRemover {
 }
 
 class GlobalScene {
+  private nonDeletedElements: readonly NonDeletedExcalidrawElement[] = [];
   private callbacks: Set<SceneStateCallback> = new Set();
 
   constructor(private _elements: readonly ExcalidrawElement[] = []) {}
@@ -22,11 +23,12 @@ class GlobalScene {
   }
 
   getElements(): readonly NonDeletedExcalidrawElement[] {
-    return getNonDeletedElements(this._elements);
+    return this.nonDeletedElements;
   }
 
   replaceAllElements(nextElements: readonly ExcalidrawElement[]) {
     this._elements = nextElements;
+    this.nonDeletedElements = getNonDeletedElements(this._elements);
     this.informMutation();
   }