- A performance metric measuring the time that a web page is unresponsive to user input. It is calculated by adding the blocking portions of long tasks between First Contentful Paint (FCP) and Time to Interactive (TTI).
- Related terms: Head-of-line blocking · First Contentful Paint · Time to Interactive · Lead time
- Previous term: Tor Project
- Next term: Total productive maintenance
- Random term: BVT (webglossary.info/random 🎲)