What actually makes a website fast?
Short answer
Server-side rendering close to the user, a small JavaScript payload, modern compressed image formats sized to their container, few third-party scripts, and cached static assets. Most slow business sites are slow because of page builders, unused scripts, and oversized hero images — not hosting.
Updated
The metrics that matter
Largest Contentful Paint measures when the main content appears, Interaction to Next Paint measures responsiveness, and Cumulative Layout Shift measures visual stability. Google uses all three, and they correlate with conversion because users abandon slow pages.
How we build for speed
AtomikEngine sites render on edge infrastructure so HTML is served from a location near the visitor, ship minimal client JavaScript, and serve responsive modern image formats. Performance is verified on a throttled mid-range phone, not on a desktop with fibre.