Add more _.omit benchmarks and update Underscore.

Former-commit-id: b8de29706b381ebc000a7cbaa19aa0a2a628d6a8

perf/perf.js

@@ -200,7 +200,7 @@
         }\
       }\
       \
-      if (typeof countBy != "undefined") {\
+      if (typeof countBy != "undefined" || typeof omit != "undefined") {\
         var wordToNumber = {\
           "one": 1,\
           "two": 2,\
@@ -226,7 +226,22 @@
           "twenty-two": 22,\
           "twenty-three": 23,\
           "twenty-four": 24,\
-          "twenty-five": 25\
+          "twenty-five": 25,\
+          "twenty-six": 26,\
+          "twenty-seven": 27,\
+          "twenty-eight": 28,\
+          "twenty-nine": 29,\
+          "thirty": 30,\
+          "thirty-one": 31,\
+          "thirty-two": 32,\
+          "thirty-three": 33,\
+          "thirty-four": 34,\
+          "thirty-five": 35,\
+          "thirty-six": 36,\
+          "thirty-seven": 37,\
+          "thirty-eight": 38,\
+          "thirty-nine": 39,\
+          "forty": 40\
         };\
         \
         var words = belt.keys(wordToNumber).slice(0, limit);\
@@ -293,6 +308,24 @@
           }\
         }\
       }\
+      if (typeof omit != "undefined") {\
+        \
+        var tenWordObject = {\
+          "one": 1,\
+          "two": 2,\
+          "three": 3,\
+          "four": 4,\
+          "five": 5,\
+          "six": 6,\
+          "seven": 7,\
+          "eight": 8,\
+          "nine": 9,\
+          "ten": 10\
+        };\
+        \
+        var _omitted = _.omit(wordToNumber, tenWordObject),\
+            lodashOmitted = lodash.omit(wordToNumber, tenWordObject);\
+      }\
       \
       if (typeof template != "undefined") {\
         var tplData = {\
@@ -1066,7 +1099,7 @@
   /*--------------------------------------------------------------------------*/
 
   suites.push(
-    Benchmark.Suite('`_.omit`')
+    Benchmark.Suite('`_.omit` iterating 20 properties, omitting 2 keys')
       .add('Lo-Dash', '\
         lodash.omit(object, "key6", "key13")'
       )
@@ -1075,6 +1108,30 @@
       )
   );
 
+  suites.push(
+    Benchmark.Suite('`_.omit` iterating 40 properties, omitting 20 keys')
+      .add('Lo-Dash', {
+        'fn': 'lodash.omit(wordToNumber, words)',
+        'teardown': 'function omit(){}'
+      })
+      .add('Underscore', {
+        'fn': 'result = _.omit(wordToNumber, words)',
+        'teardown': 'function omit(){}'
+      })
+  );
+
+  suites.push(
+    Benchmark.Suite('`_.omit` iterating 10 properties, omitting 20 keys')
+      .add('Lo-Dash', {
+        'fn': 'lodash.omit(tenWordObject, words)',
+        'teardown': 'function omit(){}'
+      })
+      .add('Underscore', {
+        'fn': '_.omit(tenWordObject, words)',
+        'teardown': 'function omit(){}'
+      })
+  );
+
   /*--------------------------------------------------------------------------*/
 
   suites.push(

vendor/underscore/test/objects.js

@@ -48,6 +48,10 @@ $(document).ready(function() {
     ok(_.isEqual(result, {b:2, c:3}), 'can restrict properties to those named in an array');
     result = _.pick({a:1, b:2, c:3}, ['a'], 'b');
     ok(_.isEqual(result, {a:1, b:2}), 'can restrict properties to those named in mixed args');
+
+    var Obj = function(){};
+    Obj.prototype = {a: 1, b: 2, c: 3};
+    ok(_.isEqual(_.pick(new Obj, 'a', 'c'), {a:1, c: 3}), 'include prototype props');
   });
 
   test("objects: omit", function() {
@@ -58,6 +62,10 @@ $(document).ready(function() {
     ok(_.isEqual(result, {b:2}), 'can omit several named properties');
     result = _.omit({a:1, b:2, c:3}, ['b', 'c']);
     ok(_.isEqual(result, {a:1}), 'can omit properties named in an array');
+
+    var Obj = function(){};
+    Obj.prototype = {a: 1, b: 2, c: 3};
+    ok(_.isEqual(_.omit(new Obj, 'b'), {a:1, c: 3}), 'include prototype props');
   });
 
   test("objects: defaults", function() {

vendor/underscore/underscore-min.js

@@ -6,7 +6,7 @@
 // For all details and documentation:
 // http://documentcloud.github.com/underscore
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+d){if(a!=null)if(z&&a.forEach===z)a.forEach(c,d);else if(a.length===+a.length)for(var e=0,f=a.length;e<f;e++){if(c.call(d,a[e],e,a)===o)break}else for(e in a)if(b.has(a,e)&&c.call(d,a[e],e,a)===o)break};b.map=b.collect=function(a,c,d){var b=[];if(a==null)return b;if(A&&a.map===A)return a.map(c,d);i(a,function(a,g,j){b[b.length]=c.call(d,a,g,j)});return b};b.reduce=b.foldl=b.inject=function(a,c,d,e){var f=arguments.length>2;a==null&&(a=[]);if(B&&a.reduce===B){e&&(c=b.bind(c,e));return f?a.reduce(c,
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@@ -20,13 +20,13 @@ if(G&&a.lastIndexOf===G)return a.lastIndexOf(c);for(var b=a.length;b--;)if(a[b]=
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vendor/underscore/underscore.js

@@ -698,17 +698,22 @@
 
   // Return a copy of the object only containing the whitelisted properties.
   _.pick = function(obj) {
-    var result = {};
-    each(_.flatten(slice.call(arguments, 1)), function(key) {
-      if (key in obj) result[key] = obj[key];
+    var copy = {};
+    var keys = _.flatten(slice.call(arguments, 1));
+    each(keys, function(key) {
+      if (key in obj) copy[key] = obj[key];
     });
-    return result;
+    return copy;
   };
 
    // Return a copy of the object without the blacklisted properties.
   _.omit = function(obj) {
+    var copy = _.extend({}, obj);
     var keys = _.flatten(slice.call(arguments, 1));
-    return _.pick(obj, _.difference(_.keys(obj), keys));
+    each(keys, function(key) {
+      delete copy[key];
+    });
+    return copy;
   };
 
   // Fill in a given object with default properties.