Adding Angular and dependent packages for testing

third_party/pkg/angular/perf/scope_perf.dart

+library scope_perf;
+
+import '_perf.dart';
+import 'package:angular/core/module.dart';
+import 'package:angular/core/parser/parser_library.dart';
+import 'package:di/di.dart';
+import 'package:di/dynamic_injector.dart';
+
+main() {
+  var scope = new DynamicInjector(
+      modules: [new Module()
+        ..type(Parser, implementedBy: DynamicParser)],
+      allowImplicitInjection:true).get(Scope);
+  var scope2, scope3, scope4, scope5;
+  var fill = (scope) {
+    for(var i = 0; i < 10000; i++) {
+      scope['key_$i'] = i;
+    }
+    return scope;
+  };
+
+  scope = fill(scope);
+  scope2 = fill(scope.$new());
+  scope3 = fill(scope2.$new());
+  scope4 = fill(scope3.$new());
+  scope5 = fill(scope4.$new());
+
+  time('noop', () {});
+
+  time('empty scope \$digest()', () {
+    scope.$digest();
+  });
+
+  scope.a = new A();
+
+  List watchFns = new List.generate(4000, (i) => () => i);
+  time('adding/removing 4000 watchers', () {
+    List watchers = watchFns.map(scope.$watch).toList();
+    watchers.forEach((e) => e());
+  });
+
+  List watchers = watchFns.map(scope.$watch).toList();
+  time('4000 dummy watchers on scope', () => scope.$digest());
+  watchers.forEach((e) => e());
+
+  for(var i = 0; i < 1000; i++ ) {
+    scope.$watch('a.number', () => null);
+    scope.$watch('a.str', () => null);
+    scope.$watch('a.obj', () => null);
+  }
+
+  time('3000 watchers on scope', () => scope.$digest());
+
+  //TODO(misko): build matrics of these
+  time('scope[] 1 deep', () => scope['nenexistant']);
+  time('scope[] 2 deep', () => scope2['nenexistant']);
+  time('scope[] 3 deep', () => scope3['nenexistant']);
+  time('scope[] 4 deep', () => scope4['nenexistant']);
+  time('scope[] 5 deep', () => scope5['nenexistant']);
+}
+
+class A {
+  var number = 1;
+  var str = 'abc';
+  var obj = {};
+}