The State of Web Vitals

Total Blocking Time (lab)

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Desktop field outcomes
Metric LCP INP CLS
No data for Total Blocking Time (lab) this edition.
Related signals Main-thread CPU (lab) → Lab paint timeline → Document lifecycle (lab) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured