Optimizing Core Web Vitals: Hitting 100 Lighthouse on Next.js

The Business Case for Speed

Google rankings and user bounce rates are directly tied to speed. A 1-second delay in page rendering can hurt conversions by 20%. When building enterprise platforms, achieving sub-100ms response times is a core design standard.

1. Server-Side Cache Headers

Leverage Next.js static rendering. Configure Cache-Control headers to serve cached pages directly from CloudFront CDNs. This offloads database queries, serving requests in milliseconds.

2. Asset and Script Deferring

Audit third-party scripts (e.g. tag managers, analytics scripts). Use the Next.js Script component with the 'lazyOnload' configuration to boot assets only after the primary layout renders.

3. Partial Prerendering (PPR)

With Next.js App Router, configure Partial Prerendering. This serves a static skeleton layout immediately, streaming dynamic sections (like user credentials or billing) as soon as data queries complete.