React data visualization performance optimization with hooks

Hard

You're building a React data visualization component that needs to efficiently update when its data changes. Why might this implementation cause performance issues?

ReactReact hooksReact performanceUseeffectUsecallbackRefs

1function DataChart({ data, width, height }) {
const chartRef = useRef(null);
const [processedData, setProcessedData] = useState([]);

const processData = useCallback((rawData) => {
  return rawData.map(item => ({
    x: new Date(item.timestamp).getTime(),
    y: calculateMetric(item.values),
    label: generateLabel(item)
  }));
}, []);

const calculateMetric = (values) => {
  return values.reduce((sum, val) => sum + val, 0) / values.length;
};

const generateLabel = (item) => {
  return `${item.category} - ${item.subcategory}`;
};

useEffect(() => {
  const newData = processData(data);
  setProcessedData(newData);
  
  if (chartRef.current) {
    renderChart(chartRef.current, newData, width, height);
  }
}, [data, processData, width, height]);

return <div ref={chartRef} className="chart-container" />;
31}

You're building a React data visualization component that needs to efficiently update when its data changes. Why might this implementation cause performance issues?

Hint