Next.js 16.2

Next.js 16.2 includes performance improvements, better debugging, improvements for Agents, and over 200 Turbopack fixes and improvements.

We also published dedicated deep-dive posts for two major areas of this release:

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We've significantly improved the time it takes before localhost:3000 is ready during next dev . On the same machine and project, startup is ~87% faster compared to Next.js 16.1 on the default application.

We contributed a change to React that makes Server Components payload deserialization up to 350% faster. The previous implementation used a JSON.parse reviver callback, which crosses the C++/JavaScript boundary in V8 for every key-value pair in the parsed JSON.