Optimizing Web Performance: Beyond Lighthouse Scores

The User Perspective

A perfect 100 Lighthouse score doesn't always equal a fast user experience. Performance optimization should focus on perceived load times.

Image Optimization

Images are usually the largest bottleneck. Always use modern formats like WebP or AVIF, define explicit width/height attributes to prevent layout shifts (CLS), and utilize lazy loading for images below the fold.

Font Loading

Custom fonts can severely impact the First Contentful Paint (FCP). Use font-display: swap to ensure text is visible immediately while the custom font loads in the background.

Bundle Phobia

Regularly audit your package.json. Use dynamic imports (React.lazy or Next.js next/dynamic) to split your code and only load heavy libraries when they are actually needed.