This tool renders a web page and extracts some performance metrics. As with most performance tools, the results are better thought of as relative, rather than absolute. Timing measurements in particular are dependent on the system they are run from, so may differ from real world results. Many of the points in this guide apply . This tool leaverages the: Window.performance API .
Selecting Mobile Chrome (or Googlebot Mobile) will set throttling for a mid-tier device, with fast-3g speeds, similar to lighthouse's mobile test.
URL is required
Uses these excellent open source projects: Puppeter , and inspired by a discussion with Jamie Indigo ( @Jammer_Volts ), of Not a Robot