3 reasons your React app feels slow (and how I fix them)

Most "slow React app" complaints come down to 3 things:

1. Unnecessary re-renders
   Components re-rendering when their props/state haven't actually
   changed. Fix: React.memo, useMemo, useCallback — but only where it
   actually matters, not everywhere.

2. Bundle size bloat
   Importing entire libraries for one function. Fix: tree-shaking,
   dynamic imports, and checking your bundle with tools like
   webpack-bundle-analyzer.

3. Bad data fetching patterns
   Fetching data on every render, or waterfalling requests instead of
   running them in parallel. Fix: React Query/SWR for caching,
   Promise.all for parallel requests.

I've fixed these exact issues on ecommerce and admin dashboard
projects — sometimes cutting load time by 30-40% with just these
three changes.

What's the most common performance issue you've run into?

webdevelopment #reactjs #nextjs #frontenddevelopment