Break LCP Into Four Parts
Use the four-part LCP breakdown to identify the highest-leverage fix.
LCP gets easier when the timeline has names. Time to First Byte If the HTML arrives late, every other optimization starts from behind. Look for server rendering cost, uncached HTML, redirects, distant origins, or slow backend dependencies. Resource load delay If the LCP image or text dependency is discovered late, the browser spends time not loading the thing the user is waiting for. Fix discovery through initial HTML, preload, priority, or avoiding client-only insertion. Resource load duration If the right resource starts early but takes too long, reduce bytes or distance. Image format, dimensions, compression, CDN placement, and cache policy…
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