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Performance Optimization Guide

This guide covers various techniques to optimize the performance of your Refract applications.

Table of Contents​

Memoization​

Memoization can significantly improve performance by caching the results of expensive function calls.

import { memo } from 'react';

const ExpensiveComponent = memo(({ data }) => {
  // Component implementation
});

Lazy Loading​

Lazy load components to reduce the initial bundle size:

import { lazy } from 'react';

const LazyComponent = lazy(() => import('./LazyComponent'));

State Management​

Use Local State When Possible​

Keep state as local as possible to minimize re-renders.

Batch State Updates​

Group multiple state updates together to reduce re-renders:

// Instead of:
setValue1(newValue1);
setValue2(newValue2);

// Do:
batch(() => {
  setValue1(newValue1);
  setValue2(newValue2);
});

Rendering Optimization​

Use React.memo for Pure Components​

const MyComponent = React.memo(({ value }) => {
  return <div>{value}</div>;
});

Use useMemo for Expensive Calculations​

const result = useMemo(() => {
  return expensiveCalculation(deps);
}, [deps]);

Best Practices​

  1. Avoid Inline Function Definitions in JSX
  2. Use React DevTools Profiler to identify performance bottlenecks
  3. Implement Virtualization for long lists
  4. Use Production Builds for performance testing

Tools​

  • React DevTools
  • Lighthouse
  • Web Vitals