Web VitalsLCP, INP, CLS & more Techniques62 performance techniques SnippetsReady-to-use code patterns AnswersCommon questions answered ImpactsReal-world impact data BottlenecksRoot causes & patterns

Knowledge

Web Vitals Techniques Snippets Answers Impacts Bottlenecks

Delayed LCP Image

The hero image is discovered late. Watch load delay eat the LCP budget.

CLS: –
LCP: –
INP: –
FCP: –
TTFB: –

Test builder

Image delaymsImage heightpxPreload image

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LCP · INP · CLS — fixed at the root.

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