From 95da9c0dd407347017ed959e87e453d3c8ee3145 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Tue, 26 Jan 2016 18:05:32 -0800
Subject: [PATCH] Optimize `_.isEmpty`. [closes #1888]

---
 lodash.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lodash.js b/lodash.js
index c56e9eba9..9c68f3241 100644
--- a/lodash.js
+++ b/lodash.js
@@ -9550,9 +9550,16 @@
      * // => false
      */
     function isEmpty(value) {
-      return (!isObjectLike(value) || isFunction(value.splice))
-        ? !size(value)
-        : !keys(value).length;
+      if (isArrayLike(value) &&
+          (isArray(value) || isString(value) || isArguments(value) || isFunction(value.splice))) {
+        return !value.length;
+      }
+      for (var key in value) {
+        if (hasOwnProperty.call(value, key)) {
+          return false;
+        }
+      }
+      return true;
     }
 
     /**