3 Subtle Mistakes That Slowed Down My Web App (And How I Fixed Them)

1. Too Many Uncompressed Images
   🚫 Used raw PNGs and full-res images directly.
   ✅ Fixed by lazy loading + converting to WebP + using srcset.

2. Client-Side Rendering for Everything
   🚫 My homepage took 4s to load because all data fetched after render.
   ✅ Switched to SSR (Next.js) + cached API data = instant first paint.

3. Ignoring Lighthouse Suggestions
   🚫 Didn't care about accessibility or unused JS.
   ✅ Ran PageSpeed Insights regularly and removed unused packages, reduced bundle size by 40%.