Sitespeed.io is the complete toolbox to test the web performance of your web site. Use it to monitor your performance or checkout how your competition is doing. You can see all the latest changes in the Changelog for the project.
Introduction - start here if you are new to the project or web performance testing.
Installation - install using npm, yarn or run our Docker containers.
Configuration - there’s a lot of things you can do with sitespeed.io, lets checkout how!
Browsers - collect timings using real browsers. We support Firefox, Chrome and Chrome on Android.
Connectivity - set the connectivity to emulate real users network conditions.
WebPageTest - drive WebPageTest and fetch metrics and graph them.
Lighthouse - run Lighthouse and Google PageSpeed Insights from sitespeed.io.
WebPageReplay - WebPageReplay is proxy that first records your web site and then replay it locally. That can help you find performance regression in the front-end code easier: Latency/server timings are constant.
Developers - start here when you want to do PRs or create a plugin.
How to Write a Good Bug Report - if you write a good bug report, we can spend more time helping you fixing the problem instead of asking you questions.