LCP priority hint
The strongest priority signal on the LCP element: preload, fetchpriority, preconnect, or none.
At a glance the headline numbers for LCP priority hint
The strongest priority signal on the LCP element: preload, fetchpriority, preconnect, or none.
85.9% of LCP images get no priority help at all.
LCP priority hint who uses what, and how stable each group is
Little daylight between the groups: every variant sits near 0.02 median CLS. computed
Passing CLS per LCP priority hint which group passes the CLS most often
82% of Highprio sites pass CLS. Preload trails 8 points behind, leaving 26% of its sites failing. computed
Why this matters for the Core Web Vitals, and where to start fixing it
Browsers start most images at low priority, because most images do not matter. The LCP image is the exception, and without help the browser only finds out after layout. fetchpriority=high says it upfront. A preload moves the discovery earlier as well. None means the most important resource on the page starts at the back of the queue.
One hint on one image. Spraying fetchpriority=high across the page puts the queue right back where it started.
How does this affect the Core Web Vitals?
The choice barely moves the LCP: 87% pass at best, 85% at worst. This signal does not separate passing sites from failing ones.
The split is bigger on CLS. With Highprio, 82% of sites pass it. With Preload, 74% do.
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.