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nextjs-turbopack

Guides Next.js 16 development with Turbopack bundling, caching, and bundle analysis decisions.

Updated May 7, 2026
Search Tags:#dev server#bundle analysis#nextjs#webpack#bundler#turbopack#hmr
One-click install
npx skills add https://github.com/mirzadham/trainingroombookingsystem2 --skill nextjs-turbopack-mirzadham
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: nextjs-turbopack
Source: https://github.com/mirzadham/trainingroombookingsystem2/tree/main/.agent/.agents/skills/nextjs-turbopack
Command: npx skills add https://github.com/mirzadham/trainingroombookingsystem2 --skill nextjs-turbopack-mirzadham

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Developers working with Next.js 16+ often face slow dev startup, confusing bundler choices between Turbopack and webpack, and difficulty diagnosing large production bundles. This Skill provides clear guidance on when and how to use Turbopack effectively. ## Core Features & Use Cases - Bundler Selection Guidance: Explains when to use Turbopack (default dev) versus webpack (legacy fallback with --webpack flag). - Dev Performance Optimization: Covers file-system caching under .next that speeds up restarts by 5-14x on large projects. - Bundle Analysis: Describes using the experimental Bundle Analyzer in Next.js 16.1+ to inspect output and trim heavy dependencies. - Use Case: Your Next.js app's dev server takes minutes to start. Use this Skill to confirm Turbopack is enabled, verify the cache isn't being cleared, and identify oversized dependencies with the Bundle Analyzer. ## Quick Start Ask how to speed up a slow Next.js dev server and whether to use Turbopack or webpack for your project.

Frequently Asked Questions about nextjs-turbopack

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I enable Turbopack in Next.js 16?▼

Turbopack is enabled by default in Next.js 16 when running next dev, so no configuration is needed. It uses file-system caching under .next to make restarts significantly faster on large projects.

Turbopack vs webpack for Next.js development?▼

Use Turbopack for day-to-day development since it offers faster cold starts and HMR. Switch to webpack only if you hit a Turbopack bug or depend on a webpack-only plugin, using the --webpack flag.

Does Next.js 16 use Turbopack for production builds?▼

Production build behavior with next build may use Turbopack or webpack depending on your Next.js version. Check the official Next.js documentation for your specific release to confirm the default bundler.

Why is my Next.js dev server still slow with Turbopack?▼

Slow dev usually means the file-system cache is being cleared unnecessarily or you're on an older Next.js version. Stay on a recent Next.js 16.x release and avoid deleting the .next directory between restarts.

How do I analyze bundle size in Next.js 16?▼

Next.js 16.1+ includes an experimental Bundle Analyzer to inspect output and find heavy dependencies. Enable it via config or an experimental flag as described in the Next.js docs for your version.

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