perf(ngModel): initialize the model $name from $attrs instead of $interpolate per controller

Author: jbedard

src/ng/directive/input.js

@@ -1728,8 +1728,8 @@ is set to `true`. The parse error is stored in `ngModel.$error.parse`.
  *
  *
  */
-var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$parse', '$animate', '$timeout', '$rootScope', '$q', '$interpolate',
-    function($scope, $exceptionHandler, $attr, $element, $parse, $animate, $timeout, $rootScope, $q, $interpolate) {
+var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$parse', '$animate', '$timeout', '$rootScope', '$q',
+    function($scope, $exceptionHandler, $attr, $element, $parse, $animate, $timeout, $rootScope, $q) {
   this.$viewValue = Number.NaN;
   this.$modelValue = Number.NaN;
   this.$$rawModelValue = undefined; // stores the parsed modelValue / model set from scope regardless of validity.
@@ -1747,7 +1747,6 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
   this.$error = {}; // keep invalid keys here
   this.$$success = {}; // keep valid keys here
   this.$pending = undefined; // keep pending keys here
-  this.$name = $interpolate($attr.name || '', false)($scope);
 
 
   var parsedNgModel = $parse($attr.ngModel),
@@ -1757,8 +1756,10 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
       pendingDebounce = null,
       ctrl = this;
 
-  this.$$setOptions = function(options) {
+  this.$$init = function(options, name) {
     ctrl.$options = options;
+    ctrl.$name = name;
+
     if (options && options.getterSetter) {
       var invokeModelGetter = $parse($attr.ngModel + '()'),
           invokeModelSetter = $parse($attr.ngModel + '($$$p)');
@@ -2527,7 +2528,7 @@ var ngModelDirective = ['$rootScope', function($rootScope) {
           var modelCtrl = ctrls[0],
               formCtrl = ctrls[1] || nullFormCtrl;
 
-          modelCtrl.$$setOptions(ctrls[2] && ctrls[2].$options);
+          modelCtrl.$$init(ctrls[2] && ctrls[2].$options, attr.name);
 
           // notify others, especially parent forms
           formCtrl.$addControl(modelCtrl);

test/ng/directive/inputSpec.js

@@ -24,6 +24,7 @@ describe('NgModelController', function() {
       $element: element.find('input'),
       $attrs: attrs
     });
+    ctrl.$$init(null, attrs.name);
   }));