Core Web Vitals & Speed Optimization
Measuring first, then fixing what actually makes the page slow.
Speed work is diagnosis before optimisation. We measure a site with field data from real visitors and with lab tools, find what is genuinely costing time, and fix the causes rather than chasing a score with tricks that do not hold.
Tools we work in
- Chrome DevTools
- Lighthouse
- PageSpeed Insights
- WebPageTest
- Cloudflare
- Sentry
Scope
What this covers
The specific work included when you engage us for this service.
- Field data analysis from real users, separated by device and connection
- Largest Contentful Paint, Interaction to Next Paint and layout shift diagnosis
- Image delivery, sizing and modern format conversion
- JavaScript and CSS reduction: splitting, deferring and removing unused code
- Font loading, server response time and caching strategy fixes
- Before-and-after measurement so each change is proven rather than assumed
What you receive
- 01A measurement baseline from field and lab data before any change
- 02Fixes applied alongside a record of what changed and its measured effect
- 03A short list of remaining causes and the honest effort each would take
Questions
Core Web Vitals & Speed Optimization, answered
Can you guarantee a green Lighthouse score?
No. Lighthouse is a lab estimate that varies with the machine running it, and part of the score sits outside the code: third-party tags, the visitor's network, a CMS plugin you need. We target good Core Web Vitals in field data, which is what search and visitors actually experience, and we show you the measurements instead of a badge.
How much speed can the average site recover?
It varies too much to promise a number. In practice the largest gains usually come from images, unused JavaScript and third-party scripts. We measure your site first and tell you where the time is going before quoting any work on it.
Most often requested by
Related
More in Web Development
Website Design
Layout, type and hierarchy that make the message land.
Next.js & React Development
Typed React applications with server rendering where it helps.
WordPress Development
Content-managed sites your team can edit without a developer.
Shopify & E-commerce Development
Storefronts built for the way you actually sell and ship.
Tell us where the manual work is
A 30-minute call. We map the process, tell you what we would automate or build first, and what it costs. No retainer before you agree the scope.
- No retainer before scope is agreed
- Written plan you can act on alone
- Worldwide delivery, on your hours