Web Performance Best Practices

Performance is crucial for user experience and SEO. Here are some key practices to follow.

Image Optimization

Always optimize your images and use modern formats like WebP:

<picture>
  <source srcset="image.webp" type="image/webp">
  <img src="image.jpg" alt="Fallback image">
</picture>

Code Splitting

Here’s an example of code splitting in React:

// Before
import HeavyComponent from './HeavyComponent';

// After
const HeavyComponent = React.lazy(() => 
  import('./HeavyComponent')
);

function App() {
  return (
    <Suspense fallback={<Loading />}>
      <HeavyComponent />
    </Suspense>
  );
}

Performance Metrics

Monitor these key metrics:

• First Contentful Paint (FCP)
• Largest Contentful Paint (LCP)
• Time to Interactive (TTI)