Largest Contentful Paint (LCP) is one of the metrics tracked in the Performance section of the Lighthouse report. Each metric captures some aspect of page load speed.
Lighthouse displays LCP in seconds:
What LCP measures
LCP measures when the largest content element in the viewport is rendered to the screen. This approximates when the main content of the page is visible to users. See Largest Contentful Paint defined for more details on how LCP is determined.
How Lighthouse determines your LCP score
The table below shows how to interpret your LCP score:
|Over 4||Red (slow)|
See the Lighthouse performance scoring post to learn how your page's overall performance score is calculated.