Performance is product quality. Slow pages lose signups, degrade trust, and quietly hurt SEO in competitive niches. The good news: most teams can get 80% of the value with a short playbook centered on Core Web Vitals.

Measure like a product decision, not a vanity score

Pick field data (real users) when you can, and supplement with lab tests when iterating locally. Before changing code, answer:

Which route or template is the worst for LCP?
Where do users see jank—INP hotspots on click/keyboard handlers?
Do late-loading assets cause CLS on mobile?

If you only fix one page, fix the one that carries your primary conversion.

Budgets that engineering and design can share

A performance budget is just a constraint everyone agrees on. Examples:

Hero LCP image under a known byte budget and with explicit dimensions.
No blocking scripts on the critical path for landing pages.
Third-party tags gated until after first interaction (or removed).

Budgets prevent “just add one more analytics snippet” from becoming death by a thousand cuts.

The fixes that usually win

These are not glamorous, but they consistently move scores:

Right-size images and serve modern formats.
Split or lazy-load non-critical work; keep above-the-fold interactions lean.
Avoid layout thrash: reserve space for media, skeletons, and dynamic UI.
Audit font loading and reduce flashes of invisible text where possible.

Tie performance back to business outcomes

Record a before/after for the metric you care about—bounce rate, signup completion, or time-to-first-success in your app. When stakeholders ask why perf matters, show the graph, not the Lighthouse trophy.

If you want a focused pass on your public site or app shell, I take on select consulting projects—send your URL and what “success” looks like for your users.