From 4910737064e364ac5f2525c43dff9e01365be3c2 Mon Sep 17 00:00:00 2001
From: Travis Ralston <travisr@matrix.org>
Date: Mon, 12 Jul 2021 14:08:42 -0600
Subject: [PATCH] Improve arraySeed utility

This is a tiny microimprovement, but worthwhile the more we use it.
---
 src/utils/arrays.ts | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/utils/arrays.ts b/src/utils/arrays.ts
index 6524debfb7a..3f9dcbc34bc 100644
--- a/src/utils/arrays.ts
+++ b/src/utils/arrays.ts
@@ -112,11 +112,9 @@ export function arrayRescale(input: number[], newMin: number, newMax: number): n
  * @returns {T[]} The array.
  */
 export function arraySeed<T>(val: T, length: number): T[] {
-    const a: T[] = [];
-    for (let i = 0; i < length; i++) {
-        a.push(val);
-    }
-    return a;
+    // Size the array up front for performance, and use `fill` to let the browser
+    // optimize the operation better than we can with a `for` loop, if it wants.
+    return new Array<T>(length).fill(val);
 }
 
 /**