Testing a website on high-speed fibre in Sandton gives a completely false sense of how real customers experience your digital presence. Across South Africa, mobile users regularly navigate on congested cell towers, throttled bandwidth, or high-latency connections.
Achieving sub-second First Contentful Paint (FCP) and passing Google Core Web Vitals on mobile requires relentless technical discipline at the architectural layer.
Essential Performance Pillars
- Edge caching in Johannesburg / Cape Town — Serving HTML responses from local CDN edge nodes rather than European origins
- Next-gen image formatting (WebP & AVIF) — Reducing media payloads by 70% with automatic responsive srcsets
- Zero client-side layout shifts (CLS) — Reserving explicit width and height aspect ratios on all visual containers
- Tree-shaken JavaScript bundles — Eliminating unused third-party scripts and deferred tracking tags