From f40f66d29bf52d31517e7887c13549bd20ba2792 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Mon, 22 Feb 2016 23:34:25 -0800
Subject: [PATCH] Remove a `isTypedArray` check and unnecessary stack creation
 from `baseIsEqualDeep`.

---
 lodash.js | 27 +++++++++++----------------
 1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/lodash.js b/lodash.js
index bb1476f37..489c22f83 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2877,41 +2877,36 @@
 
       if (!objIsArr) {
         objTag = getTag(object);
-        if (objTag == argsTag) {
-          objTag = objectTag;
-        } else if (objTag != objectTag) {
-          objIsArr = isTypedArray(object);
-        }
+        objTag = objTag == argsTag ? objectTag : objTag;
       }
       if (!othIsArr) {
         othTag = getTag(other);
-        if (othTag == argsTag) {
-          othTag = objectTag;
-        } else if (othTag != objectTag) {
-          othIsArr = isTypedArray(other);
-        }
+        othTag = othTag == argsTag ? objectTag : othTag;
       }
       var objIsObj = objTag == objectTag && !isHostObject(object),
           othIsObj = othTag == objectTag && !isHostObject(other),
           isSameTag = objTag == othTag;
 
-      stack || (stack = new Stack);
-      if (isSameTag && !(objIsArr || objIsObj)) {
-        return equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
+      if (isSameTag && !objIsObj) {
+        stack || (stack = new Stack);
+        return (objIsArr || isTypedArray(object))
+          ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
+          : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
       }
-      var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
-      if (!isPartial) {
+      if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
         var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
             othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
         if (objIsWrapped || othIsWrapped) {
+          stack || (stack = new Stack);
           return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
         }
       }
       if (!isSameTag) {
         return false;
       }
-      return (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, bitmask, stack);
+      stack || (stack = new Stack);
+      return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
     }
 
     /**