From d40c5d3de80a3e7435e3bfc7fe7077fb2d5c88aa Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Mon, 9 Nov 2015 17:26:19 -0800
Subject: [PATCH] Add `createSet`.

---
 lodash.js | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/lodash.js b/lodash.js
index 8dc8eb223..da9260ba4 100644
--- a/lodash.js
+++ b/lodash.js
@@ -3378,8 +3378,7 @@
      * @returns {Array} Returns the new duplicate free array.
      */
     function baseUniq(array, iteratee, comparator) {
-      var seen,
-          index = -1,
+      var index = -1,
           includes = arrayIncludes,
           length = array.length,
           isCommon = true,
@@ -3391,6 +3390,10 @@
         includes = arrayIncludesWith;
       }
       else if (length >= LARGE_ARRAY_SIZE) {
+        var set = createSet(array);
+        if (set) {
+          return setToArray(set);
+        }
         isCommon = false;
         includes = cacheHas;
         seen = new SetCache;
@@ -4227,6 +4230,17 @@
       };
     }
 
+    /**
+     * Creates a set of `values`.
+     *
+     * @private
+     * @param {Array} values The values to add to the set.
+     * @returns {Object} Returns the new set.
+     */
+    var createSet = !(Set && new Set([1, 2]).size === 2) ? noop : function(values) {
+      return new Set(values);
+    };
+
     /**
      * Creates a function that either curries or invokes `func` with optional
      * `this` binding and partially applied arguments.