I added 4 lines to my &lt;head&gt; and cut ~600ms from LCP.
Most of us only use &lt;link&gt; for stylesheets — but that leaves performance on the table.
preload, prefetch, and preconnect give the browser context it doesn’t have by default.
Simple change, real impact.
Full breakdown:
<a href="https://medium.com/@TusharKanjariya/four-lines-in-head-changed-my-site-speed-449bfeb396a2" target="_blank" rel="noopener nofollow">Read More</a>

Tushar Kanjariya

Adding four HTML resource hint directives — preload, prefetch, and preconnect — to the <head> element can reduce Largest Contentful Paint (LCP) by around 600ms. These <link> attributes give the browser early context about critical resources, improving page load performance with minimal code changes.

Four Lines in <head> Changed My Site Speed