perf($rootScope): moving internal queues out of the Scope instances

Author: jbedard

src/ng/rootScope.js

@@ -130,11 +130,8 @@ function $RootScopeProvider(){
                      this.$$childHead = this.$$childTail = null;
       this.$root =  this;
       this.$$destroyed = false;
-      this.$$asyncQueue = [];
-      this.$$postDigestQueue = [];
       this.$$listeners = this.$$listenerCount = null;
       this.$$isolateBindings = null;
-      this.$$applyAsyncQueue = [];
     }
 
     /**
@@ -192,9 +189,6 @@ function $RootScopeProvider(){
         if (isolate) {
           child = new Scope();
           child.$root = this.$root;
-          // ensure that there is just one async queue per $rootScope and its children
-          child.$$asyncQueue = this.$$asyncQueue;
-          child.$$postDigestQueue = this.$$postDigestQueue;
         } else {
           // Only create a child scope class if somebody asks for one,
           // but cache it to allow the VM to optimize lookups.
@@ -692,8 +686,6 @@ function $RootScopeProvider(){
       $digest: function() {
         var watch, value, last,
             watchers,
-            asyncQueue = this.$$asyncQueue,
-            postDigestQueue = this.$$postDigestQueue,
             length,
             dirty, ttl = TTL,
             next, current, target = this,
@@ -870,9 +862,6 @@ function $RootScopeProvider(){
         this.$parent = this.$$nextSibling = this.$$prevSibling = this.$$childHead =
             this.$$childTail = this.$root = this.$$watchers = this.$$listeners = null;
 
-        // don't reset these to null in case some async task tries to register a listener/watch/task
-        this.$$asyncQueue = this.$$postDigestQueue = [];
-
         // prevent NPEs since these methods have references to properties we nulled out
         this.$destroy = this.$digest = this.$apply = noop;
         this.$on = this.$watch = this.$watchGroup = function() { return noop; };
@@ -942,19 +931,19 @@ function $RootScopeProvider(){
       $evalAsync: function(expr) {
         // if we are outside of an $digest loop and this is the first time we are scheduling async
         // task also schedule async auto-flush
-        if (!$rootScope.$$phase && !$rootScope.$$asyncQueue.length) {
+        if (!$rootScope.$$phase && !asyncQueue.length) {
           $browser.defer(function() {
-            if ($rootScope.$$asyncQueue.length) {
+            if (asyncQueue.length) {
               $rootScope.$digest();
             }
           });
         }
 
-        this.$$asyncQueue.push({scope: this, expression: expr});
+        asyncQueue.push({scope: this, expression: expr});
       },
 
       $$postDigest : function(fn) {
-        this.$$postDigestQueue.push(fn);
+        postDigestQueue.push(fn);
       },
 
       /**
@@ -1038,7 +1027,7 @@ function $RootScopeProvider(){
        */
       $applyAsync: function(expr) {
         var scope = this;
-        expr && $rootScope.$$applyAsyncQueue.push($applyAsyncExpression);
+        expr && applyAsyncQueue.push($applyAsyncExpression);
         scheduleApplyAsync();
 
         function $applyAsyncExpression() {
@@ -1250,6 +1239,10 @@ function $RootScopeProvider(){
 
     var $rootScope = new Scope();
 
+    var asyncQueue = [];
+    var postDigestQueue = [];
+    var applyAsyncQueue = [];
+
     return $rootScope;
 
 
@@ -1283,10 +1276,9 @@ function $RootScopeProvider(){
     function initWatchVal() {}
 
     function flushApplyAsync() {
-      var queue = $rootScope.$$applyAsyncQueue;
-      while (queue.length) {
+      while (applyAsyncQueue.length) {
         try {
-          queue.shift()();
+          applyAsyncQueue.shift()();
         } catch(e) {
           $exceptionHandler(e);
         }

test/ng/directive/ngBindSpec.js

@@ -160,13 +160,13 @@ describe('ngBind*', function() {
       it('should NOT set html for untrusted values', inject(function($rootScope, $compile) {
         element = $compile('<div ng-bind-html="html"></div>')($rootScope);
         $rootScope.html = '<div onclick="">hello</div>';
-        expect($rootScope.$digest).toThrow();
+        expect(function() { $rootScope.$digest(); }).toThrow();
       }));
 
       it('should NOT set html for wrongly typed values', inject(function($rootScope, $compile, $sce) {
         element = $compile('<div ng-bind-html="html"></div>')($rootScope);
         $rootScope.html = $sce.trustAsCss('<div onclick="">hello</div>');
-        expect($rootScope.$digest).toThrow();
+        expect(function() { $rootScope.$digest(); }).toThrow();
       }));
 
       it('should set html for trusted values', inject(function($rootScope, $compile, $sce) {

test/ng/rootScopeSpec.js

@@ -1195,23 +1195,6 @@ describe('Scope', function() {
       expect(child.log).toBe('child context');
     }));
 
-    it('should operate only with a single queue across all child and isolate scopes', inject(function($rootScope) {
-      var childScope = $rootScope.$new();
-      var isolateScope = $rootScope.$new(true);
-
-      $rootScope.$evalAsync('rootExpression');
-      childScope.$evalAsync('childExpression');
-      isolateScope.$evalAsync('isolateExpression');
-
-      expect(childScope.$$asyncQueue).toBe($rootScope.$$asyncQueue);
-      expect(isolateScope.$$asyncQueue).toBe($rootScope.$$asyncQueue);
-      expect($rootScope.$$asyncQueue).toEqual([
-        {scope: $rootScope, expression: 'rootExpression'},
-        {scope: childScope, expression: 'childExpression'},
-        {scope: isolateScope, expression: 'isolateExpression'}
-      ]);
-    }));
-
 
     describe('auto-flushing when queueing outside of an $apply', function() {
       var log, $rootScope, $browser;