metrics-service.js

import Service from 'ember-service';
import on from 'ember-evented/on';
import { bind } from 'ember-runloop';
import { subscribe } from 'ember-instrumentation';
const { newrelic } = window;

export default Service.extend({
  _instrumentComponents: on('init', {
    subscribe('render.component', {
      before: bind(this, '_beforeRenderComponent'),
      after:  bind(this, '_afterRenderComponent')
    })
  },
  _beforeRenderComponent(name, timestamp) {
    return timestamp;
  },
  _afterRenderComponent(name, end, payload, start) {
    let seconds = (end - start) / 1000;
    if (seconds > .1) {
      newrelic.addPageAction(payload.containerKey, {seconds});
    }
  }
});