dynamicIO

The dynamicIO flag is an experimental feature in Next.js that causes data fetching operations in the App Router to be excluded from pre-renders unless they are explicitly cached. This can be useful for optimizing the performance of dynamic data fetching in server components.

It is useful if your application requires fresh data fetching during runtime rather than serving from a pre-rendered cache.

It is expected to be used in conjunction with use cache so that your data fetching happens at runtime by default unless you define specific parts of your application to be cached with use cache at the page, function, or component level.

Usage

To enable the dynamicIO flag, set it to true in the experimental section of your next.config.ts file:

import type { NextConfig } from 'next'
 
const nextConfig: NextConfig = {
  experimental: {
    dynamicIO: true,
  },
}
 
export default nextConfig

When dynamicIO is enabled, you can use the following cache functions and configurations:

• The use cache directive
• The cacheLife function with use cache
• The cacheTag function

Notes

• While dynamicIO can optimize performance by ensuring fresh data fetching during runtime, it may also introduce additional latency compared to serving pre-rendered content.