Fast, reliable websites begin with a few deliberate choices: ship only the code you need, optimize media, and make the most of your framework’s built-in rendering and caching features.
Keep components focused and make data boundaries clear. That makes it easier to understand what runs on the server, what needs the browser, and where slow requests are coming from.
Measure performance with real user journeys, not just a single score. Then fix the biggest bottleneck first and check that the change improves the experience.