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Performance & Caching

Font Optimization

Next.js automatically optimizes fonts (including Google Fonts) by hosting them locally and removing external network requests.

Interactive Simulation Engine
Font Delivery Pipeline
Compute

Next.js Server

Edge Runtime

Download Fonts at Build
Browser

Client Runtime

V8 Engine

Architectural Implication

Generated once at build-time. Near-instant delivery from global CDNs with zero compute overhead per user.

Executable Code Workbench
page.tsx
Live Code Editor
1import { Inter } from 'next/font/google'
2
3const inter = Inter({ subsets: ['latin'] })
4
5export default function RootLayout({ children }) {
6  return (
7    <html lang="en" className={inter.className}>
8      <body>{children}</body>
9    </html>
10  )
11}
Mental Model
Bringing the fonts home. Instead of the browser asking Google for a font every time, Next.js downloads it once at build time.
Why This Exists
To prevent 'Layout Shift' (where text jumps when fonts load) and to speed up page loads by eliminating external font requests.
Critical Note
"Developers often confuse this pattern with traditional client React. Use the Live Code Workbench above to simulate execution."