Angular Perf Demo: 10000 draggable SVG boxes

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
    <script src="config.js"></script>
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <my-app>
    loading...
  </my-app>
  </body>

</html>

/* Styles go here */

### Angular Starter Plunker - Typescript

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  map: {
    
    'app': './src',
    
    '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app.module';

platformBrowserDynamic().bootstrapModule(AppModule)

import { Component } from '@angular/core';

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}

@Component({
  selector: 'my-app',
  template: `
    <svg width="550" height="550"
      (mousedown)="mouseDown($event)"
      (mousemove)="mouseMove($event)"
      (mouseup)="mouseUp($event)"
      >
      <svg:g
        box
        *ngFor="let box of boxes"
        [box]="box"
        [selected]="box.id == currentId"
        ></svg:g>
    </svg>
  `
})
export class AppComponent {

  currentId = null;
  boxes = [];
  offsetX;
  offsetY;

  ngOnInit() {
    for (let i=0; i < 10000; i++) {
      const id = i;
      const x = getRandomInt(0, 500);
      const y = getRandomInt(0, 500);
      const box = {
        id,
        x,
        y
      };
      this.boxes.push(box);
    }
  }

  mouseDown(event) {
    const id = Number(event.target.getAttribute("dataId"));
    const box = this.boxes[id];
    const mouseX = event.clientX;
    const mouseY = event.clientY;
    this.offsetX = box.x - mouseX;
    this.offsetY = box.y - mouseY;
    this.currentId = id;
  }

  mouseMove(event) {
    event.preventDefault();
    if (this.currentId !== null) {
      this.updateBox(this.currentId, event.clientX + this.offsetX, event.clientY + this.offsetY);
    }
  }

  mouseUp($event) {
    this.currentId = null;
  }

  updateBox(id, x, y) {
    const box = this.boxes[id];
    box.x = x;
    box.y = y;
  }

}

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';

import { AppComponent } from './app';
import { BoxComponent } from './box.component';

@NgModule({
  declarations: [
    AppComponent,
    BoxComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

import { Component, OnInit, Input } from '@angular/core';

@Component({
  selector: '[box]',
  template: `
    <svg:rect
      [attr.dataId]="box.id"
      [attr.x]="box.x"
      [attr.y]="box.y"
      width="20"
      height="20"
      stroke="black"
      [attr.fill]="selected ? 'red' : 'transparent'"
      strokeWidth="1"></svg:rect>
  `
})
export class BoxComponent {
  @Input() box;
  @Input() selected;
}