perf(ivy): class bindings benchmark (#33470)

PR Close #33470

modules/benchmarks/src/class_bindings/app.component.ts

@@ -0,0 +1,38 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import {Component} from '@angular/core';
+
+@Component({
+  selector: 'app-component',
+  template: `
+    <button id="create" (click)="create()">Create</button>
+    <button id="update" (click)="update()">Update</button>
+    <button id="destroy" (click)="destroy()">Destroy</button>
+    <class-bindings *ngIf="show" [msg]="msg" [list]="list"><class-bindings>
+  `
+})
+export class AppComponent {
+  show = false;
+  msg = 'hello';
+  list: {i: number, text: string}[] = [];
+
+  constructor() {
+    for (let i = 0; i < 1000; i++) {
+      this.list.push({i, text: 'foobar' + i});
+    }
+  }
+
+  create() { this.show = true; }
+
+  update() {
+    this.msg = this.msg === 'hello' ? 'bye' : 'hello';
+    this.list[0].text = this.msg;
+  }
+
+  destroy() { this.show = false; }
+}