New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
	init: function() {
		this._super.apply(this, arguments);
	
		var arr = [];
		for (var i = 0; i < 1000; i++) {
                     arr.push(i);            
		}
        this.set('someLargeArray', arr);
	},
                                 
	didInsertElement: function() {
    	this.set('parentTest', this);                             
    }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

  actions: {
    show: function() {
		if (this.get('isShown')) {
			this.set('components', []);
			return;
		}
		
		var t = [];
		for (var i =0; i < 1000; i++) {
                                t.push(i);
        }
		this.set('components', t);
		this.set('isShown', true);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<button {{action 'show'}}>Show</button>
{{#each components as |com|}}
	{{my-component}}
{{/each}}

templates.components.my-component.hbs

Hello world

twiddle.json

{
  "version": "0.9.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.8",
    "ember-data": "2.6.0",
    "ember-template-compiler": "1.13.8"
  }
}