Add _.unzip. [closes #225]

Former-commit-id: 4b2c7fc068fd430f3d78de850a5f7670fd0e1a4e

perf/perf.js

@@ -487,6 +487,10 @@
         var _findWhere = _.findWhere || _.find,\
             lodashFindWhere = lodash.findWhere || lodash.find,\
             whereObject = { "num": 9 };\
+      }\
+      if (typeof zip != "undefined") {\
+        var unzipped = [["a", "b", "c"], [1, 2, 3], [true, false, true]],\
+            zipped = [["a", 1, true], ["b", 2, false], ["c", 3, true]];\
       }'
   });
 
@@ -1752,6 +1756,20 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('`_.unzip`')
+      .add(buildName, {
+        'fn': 'lodash.unzip(zipped);',
+        'teardown': 'function zip(){}'
+      })
+      .add(otherName, {
+        'fn': '_.unzip(zipped);',
+        'teardown': 'function zip(){}'
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   suites.push(
     Benchmark.Suite('`_.values`')
       .add(buildName, '\
@@ -1802,6 +1820,20 @@
 
   /*--------------------------------------------------------------------------*/
 
+  suites.push(
+    Benchmark.Suite('`_.zip`')
+      .add(buildName, {
+        'fn': 'lodash.zip.apply(lodash, unzipped);',
+        'teardown': 'function zip(){}'
+      })
+      .add(otherName, {
+        'fn': '_.zip.apply(_, unzipped);',
+        'teardown': 'function zip(){}'
+      })
+  );
+
+  /*--------------------------------------------------------------------------*/
+
   if (Benchmark.platform + '') {
     log(Benchmark.platform);
   }