<p><a href="
https://developers.chrome.com/docs/crux/methodology/metrics#lcp-image-subparts" target="_blank">Largest Contentful Paint (LCP) image subparts</a> help
identify likely causes of slow image LCPs. They break the LCP time
into four parts:
<ul>
<li><strong>Time to first byte</strong>: The time from when the user
initiates loading the page until the browser receives the first
byte of the HTML document response.</li>
<li><strong>Resource load delay</strong>: The time between TTFB and
when the browser starts loading the LCP resource.</li>
<li><strong>Resource load duration</strong>: The duration of time it
takes to load the LCP resource itself.</li>
<li><strong>Element render delay</strong>: The time between when the
LCP resource finishes loading and the LCP element rendering fully.</li>
</ul>
LCP image subparts data is only available for image LCPs (excluding videos).
View the LCP Resource Type metric to see how often images are LCP
elements for your site.</p>