From 6d01c482d8ccb9f526836274066d9c604ae0a62f Mon Sep 17 00:00:00 2001
From: Bjorn Stromberg <bjorn@bjornstar.com>
Date: Mon, 27 Jul 2020 18:15:59 +0900
Subject: [PATCH] [Perf] Avoid iterating over keys to generate assert message
 (#486)

* Avoid iterating over keys to generate assert message

* Move assertion call behind guard

* Shorten line by using string template
---
 src/js/core/sprites.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/js/core/sprites.js b/src/js/core/sprites.js
index 26cd65b2..8427f2ef 100644
--- a/src/js/core/sprites.js
+++ b/src/js/core/sprites.js
@@ -158,7 +158,9 @@ export class AtlasSprite extends BaseSprite {
         const scale = parameters.desiredAtlasScale;
         const link = this.linksByResolution[scale];
 
-        assert(link, "Link not known: " + scale + " (having " + Object.keys(this.linksByResolution) + ")");
+        if (!link) {
+            assert(false, `Link not known: ${scale} (having ${Object.keys(this.linksByResolution)})`);
+        }
 
         const scaleW = w / link.w;
         const scaleH = h / link.h;