brokenpeace / sitespeed.io

Sitespeed.io is an open source tool that helps you analyze and optimize your website speed and performance, based on performance best practices advices from the coach and collecting browser metrics using the Navigation Timing API, User Timings and Visual Metrics (FirstVisualChange, SpeedIndex & LastVisualChange).

sitespeed.io

Website | Documentation | Twitter

Welcome to the wonderful world of web performance!

Using sitespeed.io you can:

• Test your web site against Web Performance best practices using the Coach.
• Collect Navigation Timing API, User Timing API and Visual Metrics from Firefox/Chrome using Browsertime.
• Run your custom-made JavaScript and collect whichever metric(s) you need.
• Test one or multiple pages, across one or many runs to get more-accurate metrics.
• Create HTML-result pages or store the metrics in Graphite.
• Write your own plugins that can do whatever tests you want/need.

See all the latest changes in the Changelog.

Vacation JULY - AUGUST

We are going to take a long vacation this year to recharge and make sure we can make sitespeed.io even better this autumn. What does this mean? We will not answer issues within 8 hours that we usually do, but don't be scared: If we get any important bugs, we will fix them. And we will do maintenance releases when there's a new Chrome/Firefox. And if you want a change, send us a PR :)

Examples of what you can do

Checkout our example dashboard.sitespeed.io

A summary report in HTML:

Individual page report:

Collected metrics from a URL in Graphite/Grafana:

Video - easiest using Docker. This gif is optimized, the quality is much better IRL:

Lets try it out

Using Docker (requires 1.10+):

$ docker run --shm-size=1g --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io --video --speedIndex https://www.sitespeed.io/

Or install using npm:

$ npm i -g sitespeed.io

Or clone the repo and test the latest changes:

$ git clone https://github.com/sitespeedio/sitespeed.io.git
$ cd sitespeed.io
$ npm install
$ bin/sitespeed.js --help
$ bin/sitespeed.js http://www.sitespeed.io

I want to help!

We have a special page for you!