The Context Most Guides Ignore
The overwhelming majority of web performance resources are written for users in the US or Western Europe — markets with predominantly fibre-connected, high-bandwidth users. South Africa is a different environment.
As of 2024:
If you're building software for South African users, these constraints should shape every performance decision you make.
What This Means in Practice
1. Mobile-First Is Non-Negotiable
Not just responsive — genuinely mobile-first. This means:
2. Lean JavaScript Budgets
Heavy JavaScript frameworks carry a real cost for data-sensitive users. Our rule: nothing ships to production without a bundle analysis. We use next-bundle-analyzer on every client project.
3. Edge Caching Matters
We deploy on platforms (Vercel, Cloudflare) that cache at edge nodes closer to South African users. This alone reduces TTFB from ~300ms to under 50ms for cached pages.
4. Offline Considerations
For apps targeting users outside of major metro areas, offline-first architecture isn't a nice-to-have. Progressive Web App patterns with service workers should be standard.
The Business Case
Performance isn't just a technical metric. Google's research shows a 1-second delay in mobile load time reduces conversions by up to 20%. For an e-commerce site doing R1M/month in revenue, that's R200k/month in lost revenue per second of delay.
For South African businesses targeting users on mobile and constrained data plans, the stakes are higher than average. Build accordingly.
Part of the Keystone Software team, building premium software for South African businesses.