Performance7 min readMay 19, 2026

Performance isn't a luxury: 0.8s or nothing.

0.8 seconds isn't a vanity technical metric. It's the difference between a visitor who stays and one who bounces.

Antto Cattalano
Antto Cattalano
Co-Founder · Diseño Gráfico & UX/UI
Performance isn't a luxury: 0.8s or nothing.

Every 100ms of delay costs any site conversion, no exceptions. That's not an opinion — it's the number every Core Web Vitals study has repeated since 2021.

Why 0.8s is the line

Above that threshold, the perception of "fast" breaks down. Users don't measure milliseconds — they feel friction, and friction translates directly into abandonment.

Speed isn't a technical feature. It's the first promise your site keeps or breaks.

How we get there

Optimized images served in the right format, JavaScript that only loads what the screen needs, and zero dependencies we can't justify. Every technical decision gets measured against that 0.8s budget.