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Download ZIP is an open source tool that helps you analyze and optimize your website speed and performance, based on performance best practices rules and collecting browser metrics using the Navigation Timing API and User Timings.
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Latest commit 4c3921e @soulgalore soulgalore 3.11.1

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Welcome to the wonderful world of web performance! can:

  • analyze your site against web performance best practice rules, crawl your site or test specific URL:s
  • measure how fast your site/pages is using the Navigation Timing API and User Timing API
  • send all your metrics to Graphite
  • benchmark your site against your competitors (comparing specific pages, creating reports, dump the data to Graphite)
  • drive WebPageTest (WPT), meaning collect metrics from WPT, create reports and or send the data to Graphite
  • test your site against your performance budget
  • output TAP or JUnit XML to run in your Continuous Integration tool
  • create configurable HTML reports
  • test your site against Google Page Speed Insights and include the result in the reports
  • create your own post task that will get the result from the analyze and do whatever you want with it (store to a database, create new reports etc)

Check the changelog for the latest changes.

You can test the online version to get a feeling of what you can do.


$ npm install -g

Help us!

Do you want to make even better? Check out the help us page.

Example reports

Summary: Pages summary: Metrics in Graphite:

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