From 2d3edb88f0bfda175082a2f55cf3cda980e5e489 Mon Sep 17 00:00:00 2001
From: Raymond May Jr <raymondmay@gmail.com>
Date: Mon, 19 Mar 2012 19:08:36 -0500
Subject: [PATCH] _.size ludicrous speed improvement

---
 underscore.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/underscore.js b/underscore.js
index 21a45c0d9..ba2ee7600 100644
--- a/underscore.js
+++ b/underscore.js
@@ -309,7 +309,11 @@
 
   // Return the number of elements in an object.
   _.size = function(obj) {
-    return _.toArray(obj).length;
+      if (_.isArray(obj)) {
+	  return obj.length;
+      } else {
+	  return _.keys(obj).length;
+      }
   };
 
   // Array Functions