10 Next.js Performance Optimization Techniques

Next.js Performance Optimization

Make your Next.js apps lightning fast with these techniques.

1. Image Optimization

import Image from 'next/image';

<Image
  src="/hero.jpg"
  width={1200}
  height={600}
  priority // Load immediately for LCP
  placeholder="blur"
/>

2. Dynamic Imports

import dynamic from 'next/dynamic';

const HeavyComponent = dynamic(
  () => import('./HeavyComponent'),
  { loading: () => <p>Loading...</p> }
);

3. Server Components

Use Server Components by default - they don't add to client bundle.

4. Route Segment Config

// app/blog/page.js
export const revalidate = 3600; // Revalidate every hour
export const dynamic = 'force-static';

5. Font Optimization

import { Inter } from 'next/font/google';
const inter = Inter({ subsets: ['latin'] });

6. Bundle Analysis

npm install @next/bundle-analyzer
// Analyze what's in your bundle

7. Caching Strategies

• Use fetch with cache options
• Implement ISR for dynamic content
• Cache database queries

8. Minimize Client JavaScript

• Use 'use client' sparingly
• Keep interactive parts small
• Lazy load below-fold content

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