Medium
How to Optimize Large Dataset Processing in React Using useMemo and Memoization
In a data visualization dashboard, you need to optimize a component that processes large datasets. Which implementation correctly memoizes the expensive calculation?
1function DataProcessor({ rawData, threshold }) {2 const processData = /* MISSING CODE */34 const processedData = processData(rawData);56 return (7 <div>8 {processedData.map(item => (9 <DataPoint10 key={item.id}11 value={item.value}12 isHighlighted={item.value > threshold}13 />14 ))}15 </div>16 );17}1819const DataPoint = memo(({ value, isHighlighted }) => (20 <div className={isHighlighted ? 'highlighted' : ''}>21 {value.toFixed(2)}22 </div>23));