test-performance

components.clock-box.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
  	updateTime(time) {
      this.set('time', time);
    }
  }
});

components.receive-time.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.test-clock.js

import Ember from 'ember';

export default Ember.Component.extend({
  time: 0,
  didInsertElement() {
    setInterval(() => {
    	this.set('time', this.get('time') + 1);
      this.get('onTime')(this.get('time'));
    }, 40)
  },
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{clock-box}}
<br>
<br>

templates.components.clock-box.hbs

{{test-clock onTime=(action 'updateTime')}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}
{{receive-time time=time}}

templates.components.receive-time.hbs

{{time}}

templates.components.test-clock.hbs

{{yield}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}