CrUX
The Chrome User Experience Report, which publishes real-user performance for origins with enough Chrome traffic.
What CrUX does not show
Absence of data is a statement about traffic volume, never about speed.
Where CrUX comes up on this site
- Core Web Vitals field data for sites CrUX does not coverThree sources of Core Web Vitals and what each can tell a small site .t{font:600 13px system-ui,sans-serif;fill:var(--ink)}.s{font:12px…
- Cache negative lookups too: a miss that is never cached repays foreverFor a local contractor the answer is no, and it always will be — CrUX only publishes an origin once it has enough Chrome visits, and a regional business does not get them.
Related terms in Delivery and rendering
What arrives on the wire, and what only exists after something else runs.
payload ratio · render dependence · render dependence gap · edge cache pinning · TTFB · Core Web Vitals · field data · prompt injection · Hydration mismatch · Dynamic rendering · DOM depth · Edge transformation · 202 interstitial · rate limiting · bot management platform
Questions about CrUX
What is CrUX?
The Chrome User Experience Report, which publishes real-user performance for origins with enough Chrome traffic.
What does CrUX not show or guarantee?
Absence of data is a statement about traffic volume, never about speed.
Which area of the glossary does CrUX belong to?
Delivery and rendering: What arrives on the wire, and what only exists after something else runs.
← Core Web Vitals · field data →
See it in the full glossary · 731 terms across 19 areas.