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nextjs-turbopack

Diagnose and optimize Next.js 16+ development with Turbopack incremental bundling and caching.

Updated Mar 25, 2026
Search Tags:#dev server#nextjs#webpack#bundler#turbopack#hmr#bundle analyzer
One-click install
npx skills add https://github.com/Femad-6/my-skills --skill nextjs-turbopack-femad-6
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: nextjs-turbopack
Source: https://github.com/Femad-6/my-skills/tree/main/.github/skills/nextjs-turbopack
Command: npx skills add https://github.com/Femad-6/my-skills --skill nextjs-turbopack-femad-6

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Slow dev server startup, sluggish hot module replacement, and confusion about when to use Turbopack versus webpack make Next.js development frustrating. This Skill provides guidance on Next.js 16+ bundler behavior so you can diagnose slow dev performance and choose the right bundler configuration. ## Core Features & Use Cases - Bundler Selection Guidance: Explains when to use Turbopack (default dev bundler) versus webpack (legacy fallback via --webpack flag) and how production builds differ by Next.js version. - Dev Performance Diagnosis: Covers file-system caching under .next, incremental bundling, and how restarts reuse previous work for faster cold starts. - Bundle Analysis: Describes the experimental Bundle Analyzer in Next.js 16.1+ for inspecting output and trimming heavy dependencies. - Use Case: Your Next.js app's dev server takes minutes to start. Use this Skill to confirm Turbopack is active, verify the cache isn't being cleared, and identify large dependencies with the Bundle Analyzer. ## Quick Start Ask the AI to explain why my Next.js dev server is slow and whether I should use Turbopack or webpack.

Frequently Asked Questions about nextjs-turbopack

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

FAQPage Schema
How do I speed up Next.js dev server startup?▼

Next.js 16+ uses Turbopack by default for next dev, which provides faster cold starts and HMR through incremental bundling and file-system caching. Ensure you are on a recent Next.js 16.x release and that the .next cache is not being cleared unnecessarily.

Turbopack vs webpack: which should I use for Next.js development?▼

Use Turbopack for day-to-day development since it is the default in Next.js 16+ and offers faster startup and hot updates. Switch to webpack with the --webpack flag only if you hit a Turbopack bug or depend on a webpack-only plugin.

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 which bundler runs in production.

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, then use it to optimize code-splitting and trim large dependencies.

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

Slowness usually comes from a cleared or disabled file-system cache, an outdated Next.js version, or very large dependencies. Verify Turbopack is active, keep the .next cache intact between restarts, and use the Bundle Analyzer to find heavy modules.

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