Next.js 16 Performance Tips Every Developer Should Know

Next.js 16 introduced several improvements focused on streaming, server rendering, and caching. Understanding these optimizations can dramatically improve user experience.

Use Server Components by Default

Server Components reduce client-side JavaScript and improve loading performance significantly.

export default async function Page() {
  const posts = await getPosts();

  return <PostsList posts={posts} />;
}

Optimize Images Properly

• Use next/image for automatic optimization.
• Serve AVIF or WebP formats.
• Lazy load offscreen images.
• Avoid oversized hero images.

The fastest JavaScript is the JavaScript you never send to the browser.