Why Performance Matters

Small performance improvements compound: faster TTFB and lower JavaScript bundle sizes directly improve user engagement and conversion.

Key Techniques

Optimize Images

Use responsive images, modern formats (WebP / AVIF), and lazy loading. Example:

<img src="/images/photo.avif" alt="hero" loading="lazy" decoding="async" width="1200" height="800"/>

Code Splitting & Dynamic Imports

Split infrequently used components so they’re loaded after initial render.

Cache Smartly

Leverage caching headers, use CDN with long TTL for static assets, and revalidate content when needed.

Measure, Then Optimize

Use Lighthouse and field metrics (CLS, LCP, FID/Hydration performance in React 19) to measure impact.