Швидкість сайту — це канал продажів, а не технічна дрібниця
Most business sites lose customers before the first screen finishes rendering. Speed is not a bonus you add at the end of a project — it is an architectural decision made on day one, and it shows up directly in conversion rates, ad costs and search visibility.
What actually slows a site down
In audits we run, the same handful of causes explain almost every slow site. None of them require exotic tooling to fix — they require discipline about what ships to the browser.
- Unoptimised hero images served at full resolution instead of modern formats
- Page builders that inject dozens of unused scripts and stylesheets
- Third-party tags — chat widgets, pixels, heatmaps — loaded before content
- Fonts that block rendering because they are requested without a fallback
- Server rendering that waits on slow database queries with no caching layer
The metrics that matter
Core Web Vitals give you three practical numbers: Largest Contentful Paint (how fast the main content appears), Interaction to Next Paint (how quickly the page responds to a tap) and Cumulative Layout Shift (how much the layout jumps around).
We target LCP under 1.5 seconds on mobile 4G, INP under 200 milliseconds and CLS below 0.05. Hitting those numbers usually means a redesign of the delivery pipeline rather than micro-optimisations.
How we build for speed
Every project starts server-rendered, so the browser receives real HTML instead of an empty shell. JavaScript is code-split per route, images are generated in multiple sizes at build time, and fonts are preloaded with a system fallback so text is always readable.
We then measure on real devices, not just a laptop on office Wi-Fi. A page that feels instant on a desktop can be painful on a mid-range Android phone with a weak connection — which is what a large share of your customers are actually using.
Treat performance as a product requirement with a number attached. When speed is written into the brief, it survives the project; when it is a nice-to-have, it disappears in the last sprint.
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