Many teams try to "fix performance" after launch.
But speed isn't something you add later.
Performance starts with:
Rendering strategy (SSR, SSG, hybrid)
Edge deployment configuration
Image optimization pipelines
Structured routing
Clean component architecture
Modern frameworks like Next.js allow for performance-first builds - but only if the system is designed correctly.
Core Web Vitals aren't just technical metrics. They affect user experience, conversion, and search visibility.
Fast websites are engineered - not patched.