sitespeed.io

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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!