Website Speed Optimization and Core Web Vitals

We start with lab data from Lighthouse and real-user data from the Chrome UX Report and Search Console, because the two often disagree. Lab tests show what a page can do under controlled conditions; field data shows what your visitors actually experience. Then we trace each slow page to specific causes.

Most LCP problems come down to the main image or heading arriving late. We resize and compress images to the size they are actually displayed at, serve modern formats such as WebP and AVIF, preload the hero image and lazy load everything below the fold. Fonts are subset, self-hosted where possible and loaded so text shows immediately.

Layout shift is fixed by reserving space: explicit width and height on images and video, fixed slots for embeds and banners, and fallback fonts matched in size so text does not jump when the custom font arrives. Arabic fonts get the same treatment, since they are often the heaviest files on a bilingual page.

On JavaScript-heavy sites we split code by route so each page loads only what it needs, defer animation libraries until they are used and remove dead dependencies. We set cache headers properly, serve static assets from a CDN and, where the stack allows, cache rendered pages and CMS responses so the server answers quickly. Every third-party script gets a hard look: it is kept, delayed or removed based on what it is worth to the business.

We build sites in SvelteKit, Next.js and Astro with Prismic, and we audit our own site with Lighthouse, so the same discipline goes into client work. We fix what moves the numbers for real users first, avoid changes that would damage the design or the way your team edits content, and report before and after on the same pages so you can see exactly what changed and why.