React 19 · Performance and transitions
Skip re-rendering a component
Re-render only when the props change.
const Row = memo(function Row({ item }: { item: Item }) {
return <li>{item.name}</li>;
});
Official React 19 documentation
More performance and transitions commands
- Cache a calculation
- Cache a function
- Keep the UI responsive during an update
- Load a component on demand
All performance and transitions commands · React 19 cheatsheet