Fix what the audit finds.

Why the edge cache misses and how to make your ETag stable so pages are served warm.

High complexity slows rendering and reduces cache efficiency — here is how to bring it down.

Stop shipping desktop-sized images to phones — use Shopify’s image_tag for correct srcset.

Explicit dimensions reserve space and prevent Cumulative Layout Shift (CLS).

Defer offscreen images with loading="lazy" to cut initial page weight.

Use fetchpriority="high" and a preload so the largest image arrives sooner.

Every external tag adds DNS, TLS and main-thread cost — audit and remove the dead weight.

Add defer/async so scripts stop blocking first paint and Total Blocking Time drops.

Warm up DNS/TLS for fonts, CDNs and analytics — but only the origins you actually use.

Tell the browser to fetch your LCP image and key font before it parses them out of CSS.