7 terms
CLS, or Cumulative Layout Shift, is the Core Web Vital that measures how much visible page content moves unexpectedly while a user views it.
FCP (First Contentful Paint) measures how long a page takes to render its first text or image, an early loading signal in web performance.
INP, Interaction to Next Paint, is a Core Web Vital that measures how quickly a page visibly responds to clicks, taps and key presses.
Lazy loading is a web performance technique that defers images, iframes and code until they are needed, cutting initial page weight and work.
LCP (Largest Contentful Paint) measures when the largest image or text block in the viewport renders; a good page reaches it within 2.5 seconds.
Speed Index is a lab metric in web performance that measures how quickly the visible content of a page is painted during loading, in milliseconds.
TTFB, or time to first byte, is a web performance metric measuring the delay from starting navigation until the first byte of the response arrives.