3000 row table test

components.timed-table.js

import Ember from 'ember';

export default Ember.Component.extend({
  arr: [[]],
  lastAttrUpdate: 0,
  didUpdateAttrs() {
    this._super();
    this.set('lastAttrUpdate', performance.now());
  },
  didRender() {
    const lastRender = performance.now(),
          lastAttrUpdate = this.get('lastAttrUpdate');
    console.log('Attrs Updated: ' + lastAttrUpdate);
    console.log('Element Rendered: ' + lastRender);
    console.log('-----------------------------------------');
    console.log('Diff: ' + (lastRender - lastAttrUpdate));
    console.log('-----------------------------------------');
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  arr: [],
	actions: {
    genArr() {
      let arr = [];
      for(let i = 0; i < 3000; i++) {
        arr[i] = [];
        for(let j = 0; j < 5; j++) {
          arr[i][j] = Math.floor(Math.random() * 10000);
        }
      }
      console.log('Array Generated: '+ performance.now());
      this.set('arr', arr);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<button onclick={{action 'genArr'}}>
  Generate Table
</button>
{{timed-table arr=arr}}
<br>
<br>

templates.components.timed-table.hbs

<table>
  {{#each arr as |row|}}
    <tr>
      {{#each row as |cell|}}
        <td>{{cell}}</td>
      {{/each}}
    </tr>
  {{/each}}
</table>

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}