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Performance Metrics for Web Browsers

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- ChromeTracingMetrics.json
- index.js
- NetworkResources.json
- NetworkTimings.json
- RafRenderingStats.json
- RuntimePerfMetrics.json
- TimelineMetrics.json
- - index.js
  - loginAction.js
  - scrollAction.js
  - wait.js
- - BaseMetrics.js
  - ChromeTracingMetrics.js
  - index.js
  - NetworkResources.js
  - NetworkTimings.js
  - RafRenderingStats.js
  - SampleMetric.js
  - TimelineMetrics.js
- - AndroidTracingProbe.js
  - index.js
  - NavTimingProbe.js
  - NetworkResourcesProbe.js
  - PerfLogProbe.js
  - RafBenchmarkingProbe.js
  - SampleProbe.js
- cli.js
- helpers.js
- index.js
- options.js
- runner.js
- - e2e.spec.js
  - runner.spec.js
- - android-hybrid.config.json
  - android.config.json
  - browserstack.config.json
  - chrome_canary.config.json
  - ios-hybrid-appium.config.json
  - ios-safari-appium.config.json
  - saucelabs.config.json
  - selenium_debug.config.json
  - selenium_local.config.json
- - actions.spec.js
  - docs.spec.js
  - helpers.spec.js
  - metrics.spec.js
  - util.spec.js
- test.helper.js
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.travis.yml
license.txt
package.json
README.md

// repository documentation

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# browser-perf

- Is a NodeJS based tool
- For measuring browser performance metrics (like frame rates, expensive layouts, paints, styles, etc.) 
- For Web pages, Cordova/Phonegap and other Hybrid applications. 
- Metrics are measured while mimicking real user interactions - clicking buttons, typing content, etc.  
- Tool collects the metrics from sources like `about:tracing`, Chrome Devtools timeline, IE UI Responsiveness tab, Xperf, etc. 
- Monitor this information regularly by integrating the tool with continuous integration systems.

## Documentation 
Read more on [why browser-perf here](https://github.com/axemclion/browser-perf/wiki#why-browser-perf-).

Please see the [wiki pages](https://github.com/axemclion/browser-perf/wiki/_pages) for more information. 
You can find information about supported browsers, [getting started](https://github.com/axemclion/browser-perf/wiki/Setup-Instructions), [command line usage](https://github.com/axemclion/browser-perf/wiki/Command-Line-Usage), reference for the [Node API](https://github.com/axemclion/browser-perf/wiki/Node-Module---API) etc.

## Usage

### Command line

Install the tool using `npm install -g browser-perf` and then run

```
$ browser-perf http://yourwebsite.com --browsers=chrome,firefox --selenium=ondemand.saucelabs.com --username=username --accesskey=accesskey
```

- Replace username and access key with the [saucelabs.com](http://saucelabs.com) username and accesskey
- If you have [Selenium](http://www.seleniumhq.org/download/) set up, you could substitute `ondemand.saucelabs.com` with `localhost:4444/wd/hub`
- You can also use [BrowserStack](http://browserstack.com) credentials and substitute `ondemand.saucelabs.com` with `hub.browserstack.com`

See the [wiki page](https://github.com/axemclion/browser-perf/wiki/Command-Line-Usage) for an extensive list of command line options and more usage scenarios.

Here is a video of the command line usage
[![Demo of browser-perf](https://img.youtube.com/vi/0HmAFrUCIUI/0.jpg "Demo of browser-perf")](https://www.youtube.com/watch?v=0HmAFrUCIUI)

## Node Module

browser-perf is also a node module and has the following API

```javascript

```
See the [API wiki page](https://github.com/axemclion/browser-perf/wiki/Node-Module---API) for more details on configuring. 
Instructions on using it for Cordova apps is also on the [wiki](https://github.com/axemclion/browser-perf/wiki/Setup-Instructions#wiki-cordova-applications)

## Scenario
- Websites can become slow
  - over time as more CSS and Javascript is added
  - due to a single commit that adds expensive CSS (like gradients) 
- We use tools in [Chrome](https://developers.google.com/chrome-developer-tools/docs/timeline) or [Internet Explorer](http://msdn.microsoft.com/en-us/library/ie/dn255009%28v=vs.85%29.asp) only when the site is too slow. 
- Tools like YSlow and Page Speed are great, but will it not be better if the are a part of continuous integration?
- Tools like this(http://npmjs.org/package/browser-perf) and [Phantomas](https://github.com/macbre/phantomas) can fill the gap to monitor site performance every time a checkin is performed.

## License
Licensed under BSD-2 Clause. See License.txt for more details

## Contact
Please ping [me](http://twitter.com/nparashuram) if you would need help setting this up.

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