From 003c44eceee54c3398b0d2971fd97a512d7f7cec Mon Sep 17 00:00:00 2001
From: Caitlin Potter <caitpotter88@gmail.com>
Date: Wed, 8 Oct 2014 14:22:48 -0400
Subject: [PATCH] perf($animate): don't join classes before it's necessary in
 resolveElementClasses

In ngAnimate, we can't do this because the behaviour is exposed via the API. But
in core, we can avoid a bit of work.
---
 src/ng/animate.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ng/animate.js b/src/ng/animate.js
index 7a27b0db..13a0049a 100644
--- a/src/ng/animate.js
+++ b/src/ng/animate.js
@@ -116,7 +116,7 @@ var $AnimateProvider = ['$provide', function($provide) {
         }
       });
 
-      return (toAdd.length + toRemove.length) > 0 && [toAdd.join(' '), toRemove.join(' ')];
+      return (toAdd.length + toRemove.length) > 0 && [toAdd.length && toAdd, toRemove.length && toRemove];
     }
 
     function cachedClassManipulation(cache, classes, op) {