Development Performance Tips

Introduction

Slow development servers kill productivity. Beyond Turbopack, there are several techniques to speed up your development environment.

Key Concepts

Dev performance factors:

• TypeScript checking: Can slow builds significantly
• File watching: Too many files = slow HMR
• Dependencies: Large node_modules = slow startup

Deep Dive

Separate Type Checking

json
// package.json
{
  "scripts": {
    "dev": "next dev",
    "typecheck": "tsc --noEmit --watch"
  }
}

Ignore Unnecessary Files

javascript
// next.config.js
module.exports = {
  experimental: {
    // Ignore large directories during dev
    outputFileTracingIgnores: ['./node_modules/@swc/**/*'],
  },
};

Use .env.local Wisely

bash
# Avoid fetching external data during dev startup
DISABLE_ANALYTICS=true
USE_MOCK_DATA=true

Summary

Optimize development by separating type checking, ignoring unnecessary files, and using mock data during development. Combined with Turbopack, these techniques keep your dev environment fast.