Next.js Performance Basics

1. Introduction

Next.js is a powerful framework for building server-rendered React applications. Performance is a critical aspect of web applications, and Next.js provides numerous built-in optimizations to enhance application speed and user experience.

2. Key Concepts

3. Performance Optimizations

3.1 Image Optimization

Utilize the next/image component for automatic image optimization.

import Image from 'next/image';


                

3.2 Code Splitting

Automatic code splitting allows Next.js to load only the necessary JavaScript for the page being accessed.

3.3 Prefetching

Next.js automatically prefetches pages linked with the next/link component, enhancing the navigation speed.

import Link from 'next/link';

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3.4 Caching

Utilize built-in caching strategies to improve response times for API requests and page loads.

3.5 Bundle Analysis

Use the next/bundle-analyzer to analyze and reduce the size of your JavaScript bundles.

// next.config.js
const withBundleAnalyzer = require('@next/bundle-analyzer')({
    enabled: process.env.ANALYZE === 'true',
});
module.exports = withBundleAnalyzer({});
                

4. FAQ