Turbopack Memory Eviction

Usage

turbopackMemoryEviction controls whether Turbopack reclaims memory while the persistent (FileSystem) cache is enabled. After Turbopack writes a snapshot of its cache to disk, it can 'evict' the in-memory copies of that data and reload them from disk on demand.

Currently there are three options

• false: never evict. Cached data stays in memory for the lifetime of the process.
• 'auto' (default): evict after a snapshot only once enough memory has been allocated since the last eviction to make it worthwhile. Leverages thresholds and memory pressure feedback from the operating system.
• 'full': evict all possible data from memory every time we save to disk.

Good to know: This option only has an effect in next dev sessions when the FileSystem Cache is enabled, since eviction relies on data already being persisted to disk. It is experimental and under active development.

import type { NextConfig } from 'next'

const nextConfig: NextConfig = {
  experimental: {
    turbopackMemoryEviction: 'auto',
  },
}

export default nextConfig

/** @type {import('next').NextConfig} */
const nextConfig = {
  experimental: {
    turbopackMemoryEviction: 'auto',
  },
}

module.exports = nextConfig

Version Changes