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Alerts and checks

Where do the real-user speed figures come from?

Updated

Short answer

The Real-user speed (Core Web Vitals) part of a site page shows what real Chrome visitors measured on that site over the last 28 days, from Google’s Chrome UX Report. It is looked up once a day for the whole site and for its home page, and rated with Google’s own thresholds. Nothing is measured by us and nothing is estimated.

The three figures

  • Loading (Largest Contentful Paint): good up to 2.5 seconds, poor above 4 seconds.
  • Responsiveness (Interaction to Next Paint): good up to 200 ms, poor above 500 ms.
  • Visual stability (Cumulative Layout Shift): good up to 0.1, poor above 0.25.

Each figure is the 75th percentile: three visits in four were at or under it. Between good and poor, the rating is “needs improvement”.

What else you may see

  • Not enough real-user data: Google publishes these figures only for sites with enough Chrome visits. A small site often has none; this is not an error.
  • Not connected: the service has not been connected to Google’s Chrome UX Report yet, so nothing is looked up.
  • Data unavailable: the last lookup failed; it is tried again the next day.

In the report and the radar

The monthly client report carries the latest figures of each site with their rating, and the Client Risk Radar lists a site whose loading got slower for real visitors over about four weeks. This is field data from visitors, not a lab test: it does not run Lighthouse and it cannot tell why a page is slow.

Still stuck?

Tell us what you tried and what you saw. A person reads it and answers by e-mail.

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Beamfar is in its soft launch: the 14-day trial is free and needs no card, and paid plans open soon; their prices may change before then. These answers describe what the app does today.