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Optimizing React Renders
Performance

Optimizing React Renders

Understanding when and why React re-renders is key to building buttery smooth applications. We dive deep into memo, useMemo, and useCallback.

Author
Huy Nguyen
April 20, 20246 min

React is fast, but it can be faster. Unnecessary re-renders are the silent killer of performance in complex dashboards.

key concepts

  • Virtual DOM: How React detects changes.
  • Reconciliation: The process of syncing VDOM to real DOM.
  • Commit Phase: When changes are applied.

Use React.memo to prevent re-renders when props haven't changed.

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