feat(benchmarks): initial version of tree benchmark

Closes #269

modules/benchmarks/src/tree/main.html

@@ -0,0 +1,3 @@
+$SCRIPTS$
+
+<app></app>

modules/benchmarks/src/tree/main.js

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+import * as tree_benchmark from './tree_benchmark';
+
+export function main() {
+  tree_benchmark.main();
+}

modules/benchmarks/src/tree/tree_benchmark.js

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+import {benchmark, benchmarkStep} from 'benchpress/benchpress';
+
+import {ChangeDetector} from 'change_detection/change_detector';
+import {Parser} from 'change_detection/parser/parser';
+import {Lexer} from 'change_detection/parser/lexer';
+
+import {bootstrap, Component, Template, TemplateConfig, ViewPort, Compiler} from 'core/core';
+
+import {CompilerCache} from 'core/compiler/compiler';
+import {DirectiveMetadataReader} from 'core/compiler/directive_metadata_reader';
+import {TemplateLoader} from 'core/compiler/template_loader';
+
+import {reflector} from 'reflection/reflection';
+
+var MAX_DEPTH = 9;
+
+function setup() {
+  // TODO: Put the general calls to reflector.register... in a shared file
+  // as they are needed in all benchmarks...
+
+  reflector.registerType(AppComponent, {
+    'factory': () => new AppComponent(),
+    'parameters': [],
+    'annotations' : [new Component({
+      selector: 'app',
+      template: new TemplateConfig({
+        directives: [TreeComponent],
+        inline: `<tree [data]='initData'></tree>`
+      })
+    })]
+  });
+
+  reflector.registerType(TreeComponent, {
+    'factory': () => new TreeComponent(),
+    'parameters': [],
+    'annotations' : [new Component({
+      selector: 'tree',
+      bind: {
+        'data': 'data'
+      },
+      template: new TemplateConfig({
+          directives: [TreeComponent, NgIf],
+          inline: `
+    <span> {{data.value}}
+       <span template='ng-if data.left != null'><tree [data]='data.left'></span>
+       <span template='ng-if data.right != null'><tree [data]='data.right'></span>
+    </span>`
+      })
+    })]
+  });
+
+  reflector.registerType(NgIf, {
+    'factory': (vp) => new NgIf(vp),
+    'parameters': [[ViewPort]],
+    'annotations' : [new Template({
+      selector: '[ng-if]',
+      bind: {
+        'ng-if': 'ngIf'
+      }
+    })]
+  });
+
+  reflector.registerType(Compiler, {
+    'factory': (templateLoader, reader, parser, compilerCache) => new Compiler(templateLoader, reader, parser, compilerCache),
+    'parameters': [[TemplateLoader], [DirectiveMetadataReader], [Parser], [CompilerCache]],
+    'annotations': []
+  });
+
+  reflector.registerType(CompilerCache, {
+    'factory': () => new CompilerCache(),
+    'parameters': [],
+    'annotations': []
+  });
+
+  reflector.registerType(Parser, {
+    'factory': (lexer) => new Parser(lexer),
+    'parameters': [[Lexer]],
+    'annotations': []
+  });
+
+  reflector.registerType(TemplateLoader, {
+    'factory': () => new TemplateLoader(),
+    'parameters': [],
+    'annotations': []
+  });
+
+  reflector.registerType(DirectiveMetadataReader, {
+    'factory': () => new DirectiveMetadataReader(),
+    'parameters': [],
+    'annotations': []
+  });
+
+  reflector.registerType(Lexer, {
+    'factory': () => new Lexer(),
+    'parameters': [],
+    'annotations': []
+  });
+
+
+  reflector.registerGetters({
+    'value': (a) => a.value,
+    'left': (a) => a.left,
+    'right': (a) => a.right,
+    'initData': (a) => a.initData,
+    'data': (a) => a.data
+  });
+
+  reflector.registerSetters({
+    'value': (a,v) => a.value = v,
+    'left': (a,v) => a.left = v,
+    'right': (a,v) => a.right = v,
+    'initData': (a,v) => a.initData = v,
+    'data': (a,v) => a.data = v,
+    'ngIf': (a,v) => a.ngIf = v
+  });
+
+  return bootstrap(AppComponent);
+}
+
+export function main() {
+  var app;
+  var changeDetector;
+  setup().then((injector) => {
+    changeDetector = injector.get(ChangeDetector);
+    app = injector.get(AppComponent);
+  });
+
+  benchmark(`tree benchmark`, function() {
+    var count = 0;
+
+    benchmarkStep(`destroyDom binary tree of depth ${MAX_DEPTH}`, function() {
+      // TODO: We need an initial value as otherwise the getter for data.value will fail
+      // --> this should be already caught in change detection!
+      app.initData = new TreeNode('', null, null);
+      changeDetector.detectChanges();
+    });
+
+    benchmarkStep(`createDom binary tree of depth ${MAX_DEPTH}`, function() {
+      var maxDepth = 9;
+      var values = count++ % 2 == 0 ?
+        ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '*'] :
+        ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', '-'];
+
+      app.initData = buildTree(maxDepth, values, 0);
+      changeDetector.detectChanges();
+    });
+
+  });
+}
+
+class TreeNode {
+  value:string;
+  left:TreeNode;
+  right:TreeNode;
+  constructor(value, left, right) {
+    this.value = value;
+    this.left = left;
+    this.right = right;
+  }
+}
+
+function buildTree(maxDepth, values, curDepth) {
+  if (maxDepth === curDepth) return new TreeNode('', null, null);
+  return new TreeNode(
+      values[curDepth],
+      buildTree(maxDepth, values, curDepth+1),
+      buildTree(maxDepth, values, curDepth+1));
+}
+
+class AppComponent {
+  initData:TreeNode;
+  constructor() {
+    // TODO: We need an initial value as otherwise the getter for data.value will fail
+    // --> this should be already caught in change detection!
+    this.initData = new TreeNode('', null, null);
+  }
+}
+
+// TODO: Move this into a reusable directive in the 'core' module!
+class NgIf {
+  _viewPort:ViewPort;
+  constructor(viewPort:ViewPort) {
+    this._viewPort = viewPort;
+  }
+  set ngIf(value:boolean) {
+    if (this._viewPort.length > 0) {
+      this._viewPort.remove(0);
+    }
+    if (value) {
+      this._viewPort.create();
+    }
+  }
+}
+
+class TreeComponent {
+  data:TreeNode;
+}
+