A slow website: how we got katorion.io to 95+ in Lighthouse
Lighthouse: 95-99 on mobile, 100 on desktop, CLS 0
A slow website: how we got katorion.io to 95+ in Lighthouse
PageSpeed Insights shows your site in red, and on a phone the page loads so slowly that customers leave for a competitor? We know where each of these metrics comes from and what drags it down. Here is the proof on our own site: what we measured, what we fixed, and how we keep the result automatically. Send us a link to your site - we will go through its numbers and tell you what to do about them.
Sound familiar?
The first screen waits for a heavy photo, text jumps when the font arrives, and buttons move under your finger. Google sees this and ranks the site lower. We had the same: photo banners on every page, a loading screen that shifted the layout, blurred shadows, and extra scripts for old browsers. Under simulated slow mobile internet, the largest element on the page (LCP) appeared after 3.4-3.7 s.
The fix
The main text appears immediately, nothing shifts while the page loads, and every code change is checked by Lighthouse automatically - if speed drops, we see it before customers do. PageSpeed Insights, 25.09.2026: Performance 95-99 on mobile and 100 on desktop, Accessibility 100, SEO 100, CLS 0.
How we did it
- LCP: replaced photo banners with text - on most pages the largest element of the first screen is now text that waits for nothing. Screenshots are served as WebP sized for each screen
- CLS: matched a fallback font to the main font's proportions, so text does not jump when the font loads. Reserved space for images and removed a loading screen that shifted the layout
- TBT: dropped 13 KB of unused polyfills for old browsers and heavy effects - blur and hover shadows
- SEO: structured data (Organization, LocalBusiness, Service, FAQPage, BreadcrumbList), hreflang for uk/en, sitemap.xml, robots.txt and a correct heading order
- Control: Lighthouse CI on every change to main with budgets of LCP under 3.3 s, CLS under 0.1, TBT under 300 ms, SEO 90+, Accessibility 95+ - a regression turns the check red right away
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