We make slowNext.js sites fast.

I start with an audit: I profile the site on real mobile conditions, read the field data, and isolate the few things actually hurting your scores. Most sites have two or three real problems, not fifty.

Then I fix them in priority order and re-measure. You get a short report of what changed, the numbers before and after, and code you can keep building on.

The common causes are predictable: too much client-side JavaScript, heavy third-party tags, unoptimized images, and client components doing work that belongs on the server. The App Router gives you the tools to fix all of these - most teams just have not had time to apply them.

I have written about this in depth, including how to improve Lighthouse scores without compromising the design your team worked hard on.