From 1b842f86ca0be3abfae0322d4702298402cc93f5 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sat, 8 Nov 2014 19:34:37 -0800
Subject: [PATCH] Optimize `_.chunk`.

---
 lodash.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lodash.js b/lodash.js
index dca37449d..948fd1ed3 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3370,12 +3370,13 @@
      * // => [['a', 'b', 'c'], ['d']]
      */
     function chunk(array, size, guard) {
+      size = (guard || size == null) ? 1 : nativeMax(+size || 1, 1);
+
       var index = 0,
           length = array ? array.length : 0,
           resIndex = -1,
-          result = [];
+          result = Array(ceil(length / size));
 
-      size = (guard || size == null) ? 1 : nativeMax(+size || 1, 1);
       while (index < length) {
         result[++resIndex] = slice(array, index, (index += size));
       }