npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

browser-perf

v1.4.11

Published

Measure browser rendering performance metrics

Downloads

2,530

Readme

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.

Please see the wiki pages for more information. You can find information about supported browsers, getting started, command line usage, reference for the Node 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 username and accesskey
  • If you have Selenium set up, you could substitute ondemand.saucelabs.com with localhost:4444/wd/hub
  • You can also use BrowserStack credentials and substitute ondemand.saucelabs.com with hub.browserstack.com

See the wiki page 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

Node Module

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


var browserPerf = require('browser-perf');
browserPerf('/*URL of the page to be tested*/', function(err, res) {
	// res - array of objects. Metrics for this URL
	if (err) {
		console.log('ERROR: ' + err);
	} else {
		console.log(res);
	}
}, {
	selenium: 'http://localhost:4444/wd/hub',
	browsers: ['chrome', 'firefox']
	username: SAUCE_USERNAME // if running tests on the cloud  
});

See the API wiki page for more details on configuring. Instructions on using it for Cordova apps is also on the wiki

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 or Internet Explorer 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 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 if you would need help setting this up.