React Performance Optimization Techniques

Profile Before You Optimize

Start with the React Profiler or browser performance tools to understand where time is spent. It is easy to optimize the wrong component without data.

Memoization Strategies

Use React.memo, useMemo, and useCallback to avoid unnecessary work. Pair memoization with stable dependencies—especially when components receive derived props.

const Chart = React.memo(function Chart({ data }: { data: number[] }) {
  const trend = useMemo(() => computeTrend(data), [data]);
  return <TrendLine points={trend} />;
});

Split Code by Route and Component

Leverage Next.js dynamic imports or React.lazy to defer heavy bundles until they are needed.

const AnalyticsPanel = dynamic(() => import("./analytics-panel"), {
  loading: () => <Skeleton />,
});

Monitor the Runtime

Use tools like Web Vitals, Lighthouse, and performance marks to track regressions in production. Feed those metrics into your observability stack.

Conclusion

Performance is an ongoing practice. Profile regularly, eliminate wasteful renders, and ship code that feels fast on every device.