From 93af16305eb2fd24cd7d0086974c7a1fb925bd63 Mon Sep 17 00:00:00 2001
From: "Mr.doob" <info@mrdoob.com>
Date: Mon, 24 Jul 2017 15:21:19 -0700
Subject: [PATCH] WebGLRenderLists: No need to call sort if array has 1 or less
 elements.

---
 src/renderers/webgl/WebGLRenderLists.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/renderers/webgl/WebGLRenderLists.js b/src/renderers/webgl/WebGLRenderLists.js
index 479ec11dd0..fb2e0972ff 100644
--- a/src/renderers/webgl/WebGLRenderLists.js
+++ b/src/renderers/webgl/WebGLRenderLists.js
@@ -103,8 +103,8 @@ function WebGLRenderList() {
 
 	function sort() {
 
-		opaque.sort( painterSortStable );
-		transparent.sort( reversePainterSortStable );
+		if ( opaque.length > 1 ) opaque.sort( painterSortStable );
+		if ( transparent.length > 1 ) transparent.sort( reversePainterSortStable );
 
 	}
 
-- 
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