Web Vitals

New

Core Web Vitals monitoring with real-time updates

Live Metrics

—ms

LCP

—

CLS

—ms

INP

—ms

TTFB

—ms

FCP

Interact with the page to generate real Web Vitals measurements.

Largest Contentful Paint

Measures loading performance. LCP should occur within 2.5s of page load.

Good: ≤ 2.5sPoor: > 4.0s

Cumulative Layout Shift

Measures visual stability. Pages should maintain a CLS of 0.1 or less.

Good: ≤ 0.1Poor: > 0.25

Interaction to Next Paint

Measures responsiveness. INP should be 200ms or less.

Good: ≤ 200msPoor: > 500ms

Time to First Byte

Measures server responsiveness. TTFB should be under 800ms.

Good: ≤ 800msPoor: > 1800ms

First Contentful Paint

Measures perceived load speed. FCP should occur within 1.8s.

Good: ≤ 1.8sPoor: > 3.0s

Switch to the Metrics tab in the Dev Overlay to see detailed breakdowns →