Performance Optimization
Harry
· 22 Sep 2026
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Measure First
Profile with React DevTools before optimizing; colocate state to shrink render scope.
Memoization
memo skips unchanged children; useMemo caches values; useCallback stabilizes callbacks.
Bundles and Media
Split by route, chunk vendors, virtualize long lists, lazy-load images in modern formats.
Key Points
- Data flow fixes beat memoization.
- Memoize hot paths only.
- Smaller bundles load faster than clever code.