Inline objects and functions created within render methods are recreated on every render, causing unnecessary re-renders of child components when passed as props. This impacts performance by triggering component updates even when the actual functionality hasn't changed.
Inline objects and functions created within render methods are recreated on every render, causing unnecessary re-renders of child components when passed as props. This impacts performance by triggering component updates even when the actual functionality hasn’t changed.
To optimize performance, extract inline objects and functions using memoization techniques:
useCallback
for inline functionsuseMemo
for inline objectsExample of the problem:
// Problematic - creates new object on every render
<Table
locale=
/>
// Optimized - memoize the object
const tableLocale = useMemo(() => ({
emptyText: 'No data available'
}), []);
<Table locale={tableLocale} />
This practice prevents unnecessary child component re-renders and improves overall application performance.
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