ember-perf

Package	Ember Versions	Version	Status
ember-perf	1.10, 1.11, 1.12, 1.13
ember-perf-handlebars	1.5, 1.6, 1.7, 1.8, 1.9

Page load performance instrumentation for ember.js apps

Setup

# Ember.js < 1.10
ember install ember-perf-handlebars
# Ember.js >= 1.10
ember install ember-perf

Responding to performance events

Transition Events

First, create an initializer, which will set up an event listener to monitor performance events

ember g ember-perf-initializer monitor-perf

This will create files for you called

• app/initializers/monitor-perf.js
• app/instance-initializers/monitor-perf.js

You then need to go to the instance intializer and fill in the body of the event listener with something useful (i.e., sending the performance data somewhere).

perfService.on('transitionComplete', transitionData => {
  // DO SOMETHING WITH TRANSITION DATA
});

Render Events

To track render performance within a single route (i.e. how long did it take for an action triggered rerender to complete), you would use the measureRender method.

// app/components/x-foo.js
export default Ember.Component.extend({
  emberPerf: Ember.inject.service(),

  actions: {
    measureStuff() {
      const perf = this.get('emberPerf');

      perf.measureRender()
        .then(function(result) {
          // do things with the result
        });
    }
  }
});

You can also use the renderComplete event on the service from app/instance-initializers/monitor-perf.js:

perfService.on('renderComplete', renderData => {
  // Do awesome things!
});

What does this transitionData object look like?

Here's an example

{
	"destURL": "/",
	"destRoute": "index",
	"startTime": 402.85299999959534,
	"endTime": 427.16400000063004,
	"routes": [{
		"name": "application",
		"debugContainerKey": "route:application",
		"startTime": 408.78300000076706,
		"views": [],
		"endTime": 413.8860000002751,
		"elapsedTime": 5.102999999508029
	}, {
		"name": "index",
		"debugContainerKey": "route:index",
		"startTime": 415.29199999968114,
		"views": [0, 1, 2], // references to viewData array (by index)
		"endTime": 418.11000000052445,
		"elapsedTime": 2.8180000008433126
	}],
	"viewData": [{
		"startTime": 431.6899999994348,
		"id": "ember341",
		"containerKey": "view:-outlet",
		"endTime": 464.19799999966926,
		"elapsedTime": 32.50800000023446
	}, {
		"startTime": 438.75200000002224,
		"id": "ember347",
		"containerKey": "view:toplevel",
		"parentViewId": "ember341",
		"endTime": 463.9900000001944,
		"elapsedTime": 25.23800000017218
	}, {
		"startTime": 450.5559999997786,
		"id": "ember365",
		"containerKey": "component:-link-to",
		"parentViewId": "ember347",
		"endTime": 463.54000000064843,
		"elapsedTime": 12.984000000869855
	}],
	"elapsedTime": 24.3110000010347
}

Configuration

This addon can be configured in your config/environment.js file

if (environment === 'development') {
	// Log transition performance
	ENV.emberPerf = {
      debugMode: true
    };
}

• debugMode (default: false) - Logs transition performance to the browser console

Developer Installation

• git clone this repository
• npm install
• bower install

Running

• npm run tryver <EMBER_TRY_SCENARIO> s (for example, npm run tryver ember-1.8 s)
• Visit your app at http://localhost:4200.

Running Tests

• npm run tryver <EMBER_TRY_SCENARIO> (for example, npm run tryver ember-1.8)
• npm run tryver <EMBER_TRY_SCENARIO> test --server (for example, npm run tryver ember-1.8 test --server)

Building

• ember build

For more information on using ember-cli, visit http://www.ember-cli.com/.