Slow page load times
High Largest Contentful Paint (LCP)
Large bundle sizes
Frequent Cumulative Layout Shift (CLS)
Mobile performance issues

Quick Start

Minimal working example:

// utils/lazyLoad.ts
import React from 'react';

export const lazyLoad = (importStatement: Promise<any>) => {
  return React.lazy(() =>
    importStatement.then(module => ({
      default: module.default
    }))
  );
};

// routes.tsx
import { lazyLoad } from './utils/lazyLoad';

export const routes = [
  {
    path: '/',
    component: () => import('./pages/Home'),
    lazy: lazyLoad(import('./pages/Home'))
  },
  {
    path: '/dashboard',
    lazy: lazyLoad(import('./pages/Dashboard'))
  },
  {
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Code Splitting and Lazy Loading (React)	Code Splitting and Lazy Loading (React)
Image Optimization	Image Optimization
HTTP Caching and Service Workers	HTTP Caching and Service Workers
Gzip Compression and Asset Optimization	Gzip Compression and Asset Optimization
Performance Monitoring	Performance Monitoring

Best Practices

✅ DO

Follow established patterns and conventions
Write clean, maintainable code
Add appropriate documentation
Test thoroughly before deploying

❌ DON'T

Skip testing or validation
Ignore error handling
Hard-code configuration values

web-performance-optimization

Web Performance Optimization

Table of Contents

Overview

When to Use