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[turbopack] Clear chunk cache on HMR instead of creating new next-server VM #81664

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Merged
eps1lon merged 1 commit into from
Jul 16, 2025
+2 −20
Merged

[turbopack] Clear chunk cache on HMR instead of creating new next-server VM #81664

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20 changes: 1 addition & 19 deletions packages/next/src/server/dev/hot-reloader-turbopack.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ import {
} from './middleware-turbopack'
import { PageNotFoundError } from '../../shared/lib/utils'
import { debounce } from '../utils'
import { deleteCache, deleteFromRequireCache } from './require-cache'
import { deleteCache } from './require-cache'
import {
clearAllModuleContexts,
clearModuleContext,
Expand Down Expand Up @@ -342,30 +342,12 @@ export async function createHotReloaderTurbopack(

resetFetch()

const hasAppPaths = writtenEndpoint.serverPaths.some(({ path: p }) =>
p.startsWith('server/app')
)

// Edge uses the browser runtime which already disposes chunks individually.
// TODO: process.env.NEXT_RUNTIME is 'nodejs' even though Node.js runtime is not used.
if ('__turbopack_clear_chunk_cache__' in globalThis) {
;(globalThis as any).__turbopack_clear_chunk_cache__()
}

// TODO: Stop re-evaluating React Client once it relies on Turbopack's chunk cache.
if (hasAppPaths) {
deleteFromRequireCache(
require.resolve(
'next/dist/compiled/next-server/app-page-turbo.runtime.dev.js'
)
)
deleteFromRequireCache(
require.resolve(
'next/dist/compiled/next-server/app-page-turbo-experimental.runtime.dev.js'
)
)
}

const serverPaths = writtenEndpoint.serverPaths.map(({ path: p }) =>
join(distDir, p)
)
Expand Down
2 changes: 1 addition & 1 deletion packages/next/src/server/dev/require-cache.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@ import isError from '../../lib/is-error'
import { realpathSync } from '../../lib/realpath'
import { clearManifestCache } from '../load-manifest.external'

export function deleteFromRequireCache(filePath: string) {
function deleteFromRequireCache(filePath: string) {
try {
filePath = realpathSync(filePath)
} catch (e) {
Expand Down
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