Glimmer 2

_metrics.js

import { subscribe } from 'ember-instrumentation';
import { bind } from 'ember-runloop';
import EmberObject from 'ember-object';

export default EmberObject.extend({
  init() {
    this._super(...arguments);
    subscribe('render.component', {
      before: bind(this, '_before'),
      after: bind(this, '_after')
    });
  },
  _before(name, timestamp) {
    return timestamp;
  },
  _after(name, end, payload, start) {
    let time = (end - start) / 1000;
    console.log(name, time);
  }
});

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);
    console.time('my-component');
  },
  didInsertElement() {
    this._super(...arguments);
    console.timeEnd('my-component');
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Glimmer',
  init() {
    this._super(...arguments);

    this.set('times', []);
    for (let i = 0; i < 1000; i++) {
      this.get('times').push(i); 
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';
import Metrics from './_metrics';

// Ember.__loader.require('glimmer-util/lib/logger').default.level = 1;

// Metrics.create();

const Router = Ember.Router.extend({
  location: 'none'
});

Router.map(function() {
});

export default Router;

templates.application.hbs

<h1>Welcome to {{appName}}</h1>

{{#each times as |time|}}
  {{my-component time=time}}
{{/each}}

{{outlet}}

templates.components.my-component.hbs

Hello World {{attrs.time}}

templates.index.hbs

Index

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {
    	"ember-glimmer": true
    }
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-template-compiler": "canary"
  }
}