perf(ElementInjector): add a benchmark measuring the instantiation of element injectors without using reflection

modules/benchmarks/src/element_injector/benchmark.dart

@@ -1,6 +1,8 @@
 library element_injector_benchmark;
 
 import './instantiate_benchmark.dart' as ib;
+import './instantiate_benchmark_codegen.dart' as ibc;
+import './instantiate_directive_benchmark.dart' as idb;
 import 'dart:js' as js;
 
 main () {
@@ -8,4 +10,14 @@ main () {
       "name": "ElementInjector.instantiate + instantiateDirectives",
       "fn": new js.JsFunction.withThis((_) => ib.run())
   }));
+
+  js.context['benchmarkSteps'].add(new js.JsObject.jsify({
+      "name": "ElementInjector.instantiateDirectives",
+      "fn": new js.JsFunction.withThis((_) => idb.run())
+  }));
+
+  js.context['benchmarkSteps'].add(new js.JsObject.jsify({
+      "name": "ElementInjector.instantiate + instantiateDirectives (codegen)",
+      "fn": new js.JsFunction.withThis((_) => ibc.run())
+  }));
 }

modules/benchmarks/src/element_injector/benchmark.es5

@@ -5,3 +5,7 @@ System.import('benchmarks/element_injector/instantiate_benchmark').then(function
 System.import('benchmarks/element_injector/instantiate_directive_benchmark').then(function (bm) {
   window.benchmarkSteps.push({name: 'ElementInjector.instantiateDirectives', fn: bm.run});
 }, console.log.bind(console));
+
+System.import('benchmarks/element_injector/instantiate_benchmark_codegen').then(function (bm) {
+  window.benchmarkSteps.push({name: 'ElementInjector.instantiate + instantiateDirectives (codegen)', fn: bm.run});
+}, console.log.bind(console));

modules/benchmarks/src/element_injector/instantiate_benchmark.js

@@ -1,6 +1,7 @@
 import {Injector} from 'di/di';
 import {ProtoElementInjector} from 'core/compiler/element_injector';
 
+var ITERATIONS = 20000;
 var count = 0;
 
 export function run () {
@@ -8,7 +9,7 @@ export function run () {
 
   var bindings = [A, B, C];
   var proto = new ProtoElementInjector(null, bindings, []);
-  for (var i = 0; i < 20000; ++i) {
+  for (var i = 0; i < ITERATIONS; ++i) {
     var ei = proto.instantiate({view:null});
     ei.instantiateDirectives(appInjector);
   }

modules/benchmarks/src/element_injector/instantiate_benchmark_codegen.js

@@ -0,0 +1,42 @@
+import {Binding, Dependency, Key, Injector} from 'di/di';
+import {ProtoElementInjector} from 'core/compiler/element_injector';
+
+var ITERATIONS = 20000;
+var count = 0;
+
+export function run () {
+  var appInjector = new Injector([]);
+  
+  var bindings = [
+    new Binding(Key.get(A), () => new A(), [], false),
+    new Binding(Key.get(B), () => new B(), [], false),
+    new Binding(Key.get(C), (a,b) => new C(a,b), [
+      new Dependency(Key.get(A), false, false, []),
+      new Dependency(Key.get(B), false, false, [])
+    ], false)];
+
+
+  var proto = new ProtoElementInjector(null, bindings, []);
+  for (var i = 0; i < ITERATIONS; ++i) {
+    var ei = proto.instantiate({view:null});
+    ei.instantiateDirectives(appInjector);
+  }
+}
+
+class A {
+  constructor() {
+    count++;
+  }
+}
+
+class B {
+  constructor() {
+    count++;
+  }
+}
+
+class C {
+  constructor(a:A, b:B) {
+    count++;
+  }
+}

modules/benchmarks/src/element_injector/instantiate_directive_benchmark.js

@@ -1,6 +1,7 @@
 import {Injector} from 'di/di';
 import {ProtoElementInjector} from 'core/compiler/element_injector';
 
+var ITERATIONS = 20000;
 var count = 0;
 
 export function run () {
@@ -10,7 +11,7 @@ export function run () {
   var proto = new ProtoElementInjector(null, bindings, []);
   var ei = proto.instantiate({view:null});
 
-  for (var i = 0; i < 20000; ++i) {
+  for (var i = 0; i < ITERATIONS; ++i) {
     ei.clearDirectives();
     ei.instantiateDirectives(appInjector);
   }