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10 Tips for Better React Performance

Practical optimizations you can apply today

1
Memoize expensive computations

Wrap CPU-heavy calculations in useMemo to avoid recalculating on every render cycle.

2
Virtualize long lists

Render only visible rows with a virtualizer instead of mounting thousands of DOM nodes at once.

3
Code-split at the route level

Use dynamic imports to load page-specific bundles on demand and shrink initial JavaScript payload.

4
Debounce rapid user input

Delay state updates from search fields and sliders to prevent excessive re-renders during typing.

5
Move state down the tree

Keep state as close to where it is used as possible so parent components skip unnecessary re-renders.