glimmer rerender demo

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  data: {a:1,b:2},
  init() {
    this._super(...arguments);
    for(var i = 0;i<1000;i++) {
      this.data[i]= i;
    }
    
    window.setInterval(() => {
      this.data[Math.random().toString().substr(2)] = Math.random().toString().substr(2)
      delete this.data[Object.keys(this.data)[0]];
      this.rerender();
    }, 1);
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{my-component}}

templates.components.my-component.hbs

<h1>Welcome to {{data}}</h1>
<ul>
{{#each-in data as |d c|}}
	<li>{{d}}</li>
{{/each-in}}
</ul>

twiddle.json

{
  "version": "0.8.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}