From 57cfb172ecdb40a6d82a6e5d15a687d0cac89182 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 18:07:29 -0300
Subject: [PATCH 01/10] code

---
 packages/register/README.md                   |  40 ++++
 .../__test__/register-runtime-tuning.spec.ts  | 183 +++++++++++++++
 packages/register/esm.mts                     |  16 ++
 packages/register/package.json                |   1 +
 packages/register/register.ts                 | 112 ++++++++-
 packages/register/transform-cache.ts          | 221 ++++++++++++++++++
 6 files changed, 568 insertions(+), 5 deletions(-)
 create mode 100644 packages/register/__test__/register-runtime-tuning.spec.ts
 create mode 100644 packages/register/transform-cache.ts

diff --git a/packages/register/README.md b/packages/register/README.md
index adbb762d7..6243bfebd 100644
--- a/packages/register/README.md
+++ b/packages/register/README.md
@@ -127,3 +127,43 @@ Respect the boolean value in `tsconfig`.
 `TypeScript` gives files list to `@swc-node/register`, if parse `tsconfig.json` failed or files list empty, `@swc-node/register` will transform all files which were required.
 
 And if failed to parse `tsconfig.json`, `@swc-node/register` will print warning which contains failed reason.
+
+## Performance tuning
+
+### Transform cache
+
+`@swc-node/register` now keeps a transform cache (memory + disk) keyed by source, filename, compiler options, and runtime versions.
+
+Environment variables:
+
+- `SWC_NODE_CACHE=0` disable cache.
+- `SWC_NODE_CACHE_DIR=/path/to/cache` choose disk cache directory.
+  - default: `${os.tmpdir()}/swc-node-${process.getuid() ?? process.pid}`
+- `SWC_NODE_CACHE_TTL_DAYS=7` disk cache retention in days.
+- `SWC_NODE_CACHE_MEMORY_LIMIT=2000` max in-process transform entries.
+- `SWC_NODE_CACHE_DEBUG=1` print cache hit/miss/store/skip lines to stderr.
+
+Programmatic cache control:
+
+```js
+const { clearTransformCache, getTransformCacheDirectory } = require('@swc-node/register/register')
+
+// clear memory + disk (default)
+clearTransformCache()
+
+// clear only memory cache
+clearTransformCache({ memory: true, disk: false })
+
+// inspect resolved disk cache path
+console.log(getTransformCacheDirectory())
+```
+
+### Source map memory mode
+
+Use `SWC_NODE_SOURCE_MAP_MODE` to tune source map memory behavior:
+
+- `auto` (default): inline maps when Node native source maps are enabled, otherwise map-store mode.
+- `inline`: inline data URL source maps only.
+- `store`: in-memory map store only (`source-map-support` path).
+- `both`: inline + store (highest memory use, mainly for compatibility/debug edge cases).
+- `none`: disable both inline/store map injection.
diff --git a/packages/register/__test__/register-runtime-tuning.spec.ts b/packages/register/__test__/register-runtime-tuning.spec.ts
new file mode 100644
index 000000000..51aec1bc1
--- /dev/null
+++ b/packages/register/__test__/register-runtime-tuning.spec.ts
@@ -0,0 +1,183 @@
+import test from 'ava'
+import sinon from 'sinon'
+import * as ts from 'typescript'
+
+import * as swcCore from '@swc-node/core'
+import { SourcemapMap } from '@swc-node/sourcemap-support'
+
+import { clearTransformCache, compile } from '../register'
+import { clearTransformCacheForTest } from '../transform-cache'
+
+const originalEnv = { ...process.env }
+const emptyMap = '{"version":3,"sources":[],"names":[],"mappings":""}'
+
+function uniquePath(label: string, extension: string) {
+  return `/tmp/${label}-${Date.now()}-${Math.random().toString(16).slice(2)}.${extension}`
+}
+
+test.beforeEach(() => {
+  process.env.SWC_NODE_CACHE_DIR = `/tmp/swc-node-test-${process.pid}-${Date.now()}-${Math.random().toString(16).slice(2)}`
+})
+
+test.afterEach.always(() => {
+  sinon.restore()
+  SourcemapMap.clear()
+  clearTransformCache({ memory: true, disk: false })
+  process.env = { ...originalEnv }
+})
+
+test.serial('reuses transform cache for sync compile', (t) => {
+  const transformSyncStub = sinon.stub(swcCore, 'transformSync').returns({
+    code: 'console.log("cached")',
+    map: emptyMap,
+  })
+
+  const filename = uniquePath('cache-sync', 'ts')
+  const source = `const value: number = ${Date.now()}`
+
+  const first = compile(source, filename, {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+  const second = compile(source, filename, {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+
+  t.is(first, second)
+  t.is(transformSyncStub.callCount, 1)
+})
+
+test.serial('reuses transform cache for async compile', async (t) => {
+  const transformStub = sinon.stub(swcCore, 'transform').resolves({
+    code: 'console.log("cached-async")',
+    map: emptyMap,
+  })
+
+  const filename = uniquePath('cache-async', 'ts')
+  const source = `const value: number = ${Date.now()}`
+
+  const first = await compile(
+    source,
+    filename,
+    {
+      module: ts.ModuleKind.ESNext,
+      sourceMap: true,
+    },
+    true,
+  )
+  const second = await compile(
+    source,
+    filename,
+    {
+      module: ts.ModuleKind.ESNext,
+      sourceMap: true,
+    },
+    true,
+  )
+
+  t.is(first, second)
+  t.true(transformStub.callCount <= 1)
+})
+
+test.serial('supports sourcemap inline-only mode to reduce map-store memory', (t) => {
+  process.env.SWC_NODE_SOURCE_MAP_MODE = 'inline'
+
+  sinon.stub(swcCore, 'transformSync').returns({
+    code: 'console.log("inline-only")',
+    map: emptyMap,
+  })
+
+  const filename = uniquePath('sourcemap-inline', 'ts')
+  const output = compile('const x = 1', filename, {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+
+  t.true(output.includes('sourceMappingURL'))
+  t.false(SourcemapMap.has(filename))
+})
+
+test.serial('supports sourcemap store-only mode to avoid inline map payload', (t) => {
+  process.env.SWC_NODE_SOURCE_MAP_MODE = 'store'
+
+  sinon.stub(swcCore, 'transformSync').returns({
+    code: 'console.log("store-only")',
+    map: emptyMap,
+  })
+
+  const filename = uniquePath('sourcemap-store', 'ts')
+  const output = compile('const x = 1', filename, {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+
+  t.false(output.includes('sourceMappingURL'))
+  t.true(SourcemapMap.has(filename))
+})
+
+test.serial('skips transform for plain js in commonjs mode', (t) => {
+  const transformSyncStub = sinon.stub(swcCore, 'transformSync')
+
+  const output = compile('module.exports = 42', uniquePath('plain-cjs', 'js'), {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+
+  t.is(output, 'module.exports = 42')
+  t.false(transformSyncStub.called)
+})
+
+test.serial('still transforms js with esm syntax in commonjs mode', (t) => {
+  const transformSyncStub = sinon.stub(swcCore, 'transformSync').returns({
+    code: 'exports.value = 42',
+    map: emptyMap,
+  })
+
+  const output = compile('export const value = 42', uniquePath('esm-in-js', 'js'), {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  })
+
+  t.true(output.includes('exports.value = 42'))
+  t.true(transformSyncStub.calledOnce)
+})
+
+test.serial('skips transform for runtime js in esm mode', async (t) => {
+  const transformStub = sinon.stub(swcCore, 'transform')
+
+  const output = await compile(
+    'export const value = 42',
+    uniquePath('plain-esm', 'mjs'),
+    {
+      module: ts.ModuleKind.ESNext,
+      sourceMap: true,
+    },
+    true,
+  )
+
+  t.is(output, 'export const value = 42')
+  t.false(transformStub.called)
+})
+
+test.serial('can clear transform cache programmatically', (t) => {
+  const transformSyncStub = sinon.stub(swcCore, 'transformSync').returns({
+    code: 'console.log("clear-cache")',
+    map: emptyMap,
+  })
+
+  const filename = uniquePath('clear-cache', 'ts')
+  const options = {
+    module: ts.ModuleKind.CommonJS,
+    sourceMap: true,
+  }
+
+  compile('const value: number = 1', filename, options)
+  compile('const value: number = 1', filename, options)
+  t.is(transformSyncStub.callCount, 1)
+
+  clearTransformCache({ memory: true, disk: true })
+
+  compile('const value: number = 1', filename, options)
+  t.is(transformSyncStub.callCount, 2)
+})
diff --git a/packages/register/esm.mts b/packages/register/esm.mts
index a48cd0896..f2140f131 100644
--- a/packages/register/esm.mts
+++ b/packages/register/esm.mts
@@ -278,6 +278,8 @@ const tsconfigForSWCNode = {
   baseUrl: undefined,
 }
 
+const ESM_SKIP_COMPILE_EXTENSIONS = new Set(['.js', '.mjs', '.cjs', '.es', '.es6'])
+
 export const load: LoadHook = async (url, context, nextLoad) => {
   debug('load', url, JSON.stringify(context))
 
@@ -317,6 +319,15 @@ export const load: LoadHook = async (url, context, nextLoad) => {
   // and would likely be a breaking change anyway. Do a best effort to give a real path
   // like it expects, which at least fixes relative input sourcemap paths.
   const filename = url.startsWith('file:') ? fileURLToPath(url) : url
+
+  if (shouldSkipCompileInEsmLoader(filename)) {
+    debug('skip compile: runtime js module', url)
+    return addShortCircuitSignal({
+      format: resolvedFormat,
+      source,
+    })
+  }
+
   const compiled = await compile(code, filename, tsconfigForSWCNode, true)
 
   debug('compiled', url, resolvedFormat)
@@ -345,3 +356,8 @@ const parseUrl =
           return null
         }
       }
+
+function shouldSkipCompileInEsmLoader(filename: string): boolean {
+  const extension = extname(filename).toLowerCase()
+  return ESM_SKIP_COMPILE_EXTENSIONS.has(extension)
+}
diff --git a/packages/register/package.json b/packages/register/package.json
index dd1e71ebd..3e4e09ff7 100644
--- a/packages/register/package.json
+++ b/packages/register/package.json
@@ -44,6 +44,7 @@
     "@swc-node/sourcemap-support": "^0.6.1",
     "colorette": "^2.0.20",
     "debug": "^4.4.1",
+    "json-stable-stringify": "^1.3.0",
     "oxc-resolver": "^11.6.1",
     "pirates": "^4.0.7",
     "tslib": "^2.8.1"
diff --git a/packages/register/register.ts b/packages/register/register.ts
index fefb1f4c3..c6ee5aeb6 100644
--- a/packages/register/register.ts
+++ b/packages/register/register.ts
@@ -1,9 +1,14 @@
+import { extname } from 'node:path'
+
 import { Options, transform, transformSync } from '@swc-node/core'
 import { installSourceMapSupport, SourcemapMap } from '@swc-node/sourcemap-support'
 import { addHook } from 'pirates'
 import * as ts from 'typescript'
 
 import { readDefaultTsConfig, tsCompilerOptionsToSwcConfig } from './read-default-tsconfig'
+import { createCacheKey, getCachedTransform, setCachedTransform } from './transform-cache'
+
+const LooksLikeEsmSyntaxRegex = /(?:^|\n)\s*import\s|(?:^|\n)\s*export\s|\bimport\.meta\b/
 
 const DEFAULT_EXTENSIONS = new Set([
   ts.Extension.Js,
@@ -18,6 +23,16 @@ const DEFAULT_EXTENSIONS = new Set([
   '.es',
 ])
 
+const JS_RUNTIME_EXTENSIONS = new Set([ts.Extension.Js, ts.Extension.Mjs, ts.Extension.Cjs, '.es6', '.es'])
+
+// Runtime knobs here are process-scoped and comparatively cheap to read, so
+// they gate cache safety without paying per-module deep serialization costs.
+const CacheRuntimeSalt = [
+  process.env.SWCRC ? 'swcrc=1' : 'swcrc=0',
+  `swcConfig=${process.env.SWC_CONFIG_FILE ?? ''}`,
+  `sourceMapMode=${process.env.SWC_NODE_SOURCE_MAP_MODE ?? 'auto'}`,
+].join(';')
+
 const injectInlineSourceMap = ({
   filename,
   code,
@@ -27,12 +42,23 @@ const injectInlineSourceMap = ({
   code: string
   map: string | undefined
 }): string => {
-  if (map) {
+  if (!map) {
+    return code
+  }
+
+  // Choose map storage strategy at emit time so one process can tune behavior
+  // per runtime profile (debuggability vs memory) without rebuilds.
+  const sourceMapMode = getSourceMapMode()
+  if (sourceMapMode.store) {
     SourcemapMap.set(filename, map)
+  }
+
+  if (sourceMapMode.inline) {
     const base64Map = Buffer.from(map, 'utf8').toString('base64')
     const sourceMapContent = `//# sourceMappingURL=data:application/json;charset=utf-8;base64,${base64Map}`
     return `${code}\n${sourceMapContent}`
   }
+
   return code
 }
 
@@ -82,12 +108,41 @@ export function compile(
   if (sourcecode == null) {
     return
   }
-  if (options && typeof options.fallbackToTs === 'function' && options.fallbackToTs(filename)) {
-    delete options.fallbackToTs
+
+  const fallbackToTs = Boolean(options && typeof options.fallbackToTs === 'function' && options.fallbackToTs(filename))
+
+  delete options.fallbackToTs
+
+  // Fast-path before cache work for files intentionally left as runtime JS.
+  // This keeps cache logs meaningful and avoids unnecessary key generation.
+  if (!fallbackToTs && shouldSkipTransformForRuntimeJs(filename, sourcecode, options)) {
+    logCacheDebug('skip', filename)
+    return sourcecode
+  }
+
+  const cacheInput = {
+    sourcecode,
+    filename,
+    options,
+    fallbackToTs,
+    runSalt: CacheRuntimeSalt,
+  }
+
+  const cacheKey = createCacheKey(cacheInput)
+  const cacheEntry = getCachedTransform(cacheKey)
+  if (cacheEntry) {
+    // Keep source-map behavior consistent for cache hits, otherwise stack trace
+    // semantics would differ between warm and cold compiles.
+    return injectInlineSourceMap({ filename, code: cacheEntry.code, map: cacheEntry.map })
+  }
+
+  if (fallbackToTs) {
     const { outputText, sourceMapText } = ts.transpileModule(sourcecode, {
       fileName: filename,
       compilerOptions: options,
     })
+
+    setCachedTransform(cacheKey, { code: outputText, map: sourceMapText })
     return injectInlineSourceMap({ filename, code: outputText, map: sourceMapText })
   }
 
@@ -97,7 +152,7 @@ export function compile(
     swcRegisterConfig = {
       swc: {
         swcrc: true,
-        configFile: process.env.SWC_CONFIG_FILE
+        configFile: process.env.SWC_CONFIG_FILE,
       },
     }
   } else {
@@ -106,10 +161,12 @@ export function compile(
 
   if (async) {
     return transform(sourcecode, filename, swcRegisterConfig).then(({ code, map }) => {
+      setCachedTransform(cacheKey, { code, map })
       return injectInlineSourceMap({ filename, code, map })
     })
   } else {
     const { code, map } = transformSync(sourcecode, filename, swcRegisterConfig)
+    setCachedTransform(cacheKey, { code, map })
     return injectInlineSourceMap({ filename, code, map })
   }
 }
@@ -119,9 +176,54 @@ export function register(options: Partial<ts.CompilerOptions> = {}, hookOpts = {
     options = Object.keys(options).length ? options : readDefaultTsConfig()
   }
   options.module = ts.ModuleKind.CommonJS
-  installSourceMapSupport()
+
+  // Install source-map-support only when map-store mode is active; with inline
+  // mode and native source maps, this avoids duplicate map retention.
+  if (getSourceMapMode().store) {
+    installSourceMapSupport()
+  }
+
   return addHook((code, filename) => compile(code, filename, options), {
     exts: Array.from(DEFAULT_EXTENSIONS),
     ...hookOpts,
   })
 }
+
+function getSourceMapMode(): { inline: boolean; store: boolean } {
+  switch (process.env.SWC_NODE_SOURCE_MAP_MODE?.trim().toLowerCase()) {
+    case 'both':
+      return { inline: true, store: true }
+    case 'inline':
+      return { inline: true, store: false }
+    case 'store':
+      return { inline: false, store: true }
+    case 'none':
+      return { inline: false, store: false }
+  }
+
+  // In auto mode, follow runtime capability: native source maps favor inline,
+  // non-native stacks favor store mode.
+  return process.sourceMapsEnabled ? { inline: true, store: false } : { inline: false, store: true }
+}
+
+function shouldSkipTransformForRuntimeJs(filename: string, sourcecode: string, options: ts.CompilerOptions): boolean {
+  // Respect SWCRC workflows first. When users opt into external SWC config,
+  // consistency with that config takes priority over local fast-path heuristics.
+  if (process.env.SWCRC) {
+    return false
+  }
+
+  const extension = extname(filename).toLowerCase()
+  if (!JS_RUNTIME_EXTENSIONS.has(extension)) {
+    return false
+  }
+
+  const moduleKind = options.module ?? ts.ModuleKind.ES2015
+  if (moduleKind !== ts.ModuleKind.CommonJS) {
+    return true
+  }
+
+  // CommonJS mode is where accidental ESM-in-JS files usually break at runtime,
+  // so we keep the transform path only when file content indicates that risk.
+  return !LooksLikeEsmSyntaxRegex.test(sourcecode)
+}
diff --git a/packages/register/transform-cache.ts b/packages/register/transform-cache.ts
new file mode 100644
index 000000000..d8614366f
--- /dev/null
+++ b/packages/register/transform-cache.ts
@@ -0,0 +1,221 @@
+import fs from 'node:fs'
+import { createHash } from 'node:crypto'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
+import debugFactory from 'debug'
+
+const stableStringify = require('json-stable-stringify') as (value: unknown) => string
+
+interface TransformCacheEntry {
+  code: string
+  map?: string
+}
+
+interface TransformCacheKeyInput {
+  sourcecode: string
+  filename: string
+  options: Record<string, unknown>
+  fallbackToTs: boolean
+  runSalt: string
+}
+
+const debug = debugFactory('@swc-node')
+
+const CACHE_ENABLED = isEnabled(process.env.SWC_NODE_CACHE, true)
+const CACHE_DIRECTORY =
+  process.env.SWC_NODE_CACHE_DIR ?? join(tmpdir(), `swc-node-${process.getuid?.() ?? process.pid}`)
+const CACHE_TTL_DAYS = Number(process.env.SWC_NODE_CACHE_TTL_DAYS ?? '7')
+const MEMORY_CACHE_LIMIT = Number(process.env.SWC_NODE_CACHE_MEMORY_LIMIT ?? '2000')
+
+if (!Number.isFinite(MEMORY_CACHE_LIMIT) || MEMORY_CACHE_LIMIT < 0) {
+  throw new Error(`Invalid value for SWC_NODE_CACHE_MEMORY_LIMIT: ${process.env.SWC_NODE_CACHE_MEMORY_LIMIT}`)
+}
+
+const REGISTER_VERSION = readPackageVersion('../package.json')
+const SWC_VERSION = readPackageVersion('@swc/core/package.json')
+
+const memoryCache = new Map<string, TransformCacheEntry>()
+let optionsSignatureCache = new WeakMap<Record<string, unknown>, string>()
+let cacheDirectoryReady = false
+let cleanupAttempted = false
+
+export function getCachedTransform(cacheKey: string): TransformCacheEntry | undefined {
+  if (!CACHE_ENABLED) {
+    return undefined
+  }
+
+  const memoryValue = memoryCache.get(cacheKey)
+
+  if (memoryValue) {
+    return memoryValue
+  }
+
+  const diskValue = readDiskCache(cacheKey)
+
+  if (diskValue) {
+    setMemoryCache(cacheKey, diskValue)
+  }
+
+  return diskValue
+}
+
+export function setCachedTransform(cacheKey: string, value: TransformCacheEntry) {
+  if (!CACHE_ENABLED) {
+    return
+  }
+
+  setMemoryCache(cacheKey, value)
+  writeDiskCache(cacheKey, value)
+}
+
+export function createCacheKey(input: TransformCacheKeyInput): string {
+  // Keep cache reuse scoped to both source intent and toolchain version so
+  // stale compiled output is not reused across upgrades/config changes.
+  const hash = createHash('sha1')
+  hash.update(input.sourcecode)
+  hash.update('\0')
+  hash.update(input.filename)
+  hash.update('\0')
+  hash.update(input.fallbackToTs ? 'ts' : 'swc')
+  hash.update('\0')
+  hash.update(getOptionsSignature(input.options))
+  hash.update('\0')
+  hash.update(input.runSalt)
+  hash.update('\0')
+  hash.update(`register:${REGISTER_VERSION};swc:${SWC_VERSION}`)
+  return hash.digest('hex')
+}
+
+function getOptionsSignature(options: Record<string, unknown>): string {
+  const cached = optionsSignatureCache.get(options)
+  if (cached) {
+    return cached
+  }
+
+  // Options are usually reused for most compiles in one process; cache the
+  // normalized signature so hash generation stays near O(source length).
+  const signature = stableStringify(options)
+  optionsSignatureCache.set(options, signature)
+  return signature
+}
+
+function setMemoryCache(key: string, value: TransformCacheEntry) {
+  memoryCache.set(key, value)
+
+  // Bound in-process retention for long-lived services where many modules
+  // may be touched once and never needed again.
+  while (memoryCache.size > MEMORY_CACHE_LIMIT) {
+    const oldestKey = memoryCache.keys().next().value
+
+    if (!oldestKey) {
+      break
+    }
+
+    memoryCache.delete(oldestKey)
+  }
+}
+
+function readDiskCache(key: string): TransformCacheEntry | undefined {
+  try {
+    ensureCacheDirectory()
+    const file = fs.readFileSync(join(CACHE_DIRECTORY, `${key}.json`), 'utf8')
+    return JSON.parse(file) as TransformCacheEntry
+  } catch (error) {
+    debug('Failed to read cache file', error)
+    return undefined
+  }
+}
+
+function writeDiskCache(key: string, value: TransformCacheEntry) {
+  try {
+    ensureCacheDirectory()
+    fs.writeFileSync(join(CACHE_DIRECTORY, `${key}.json`), JSON.stringify(value), 'utf8')
+  } catch (error) {
+    debug('Failed to write cache file', error)
+  }
+}
+
+function ensureCacheDirectory() {
+  if (!cacheDirectoryReady) {
+    fs.mkdirSync(CACHE_DIRECTORY, { recursive: true })
+    cacheDirectoryReady = true
+  }
+
+  if (!cleanupAttempted) {
+    cleanupAttempted = true
+
+    // Trigger cleanup only after cache is actually used, so startup work stays
+    // minimal for short-lived commands.
+    void cleanupStaleDiskCache()
+  }
+}
+
+async function cleanupStaleDiskCache() {
+  if (!Number.isFinite(CACHE_TTL_DAYS) || CACHE_TTL_DAYS <= 0) {
+    return
+  }
+
+  try {
+    const files = fs.readdirSync(CACHE_DIRECTORY)
+    const now = Date.now()
+    const maxAgeMs = CACHE_TTL_DAYS * 24 * 60 * 60 * 1000
+
+    // Age-based eviction keeps disk usage stable without maintaining additional metadata files.
+    for (const file of files) {
+      if (!file.endsWith('.json')) {
+        // Non-cache files should not be touched, and may indicate a non-standard cache setup (e.g. with a symlink).
+        return
+      }
+
+      const fullPath = join(CACHE_DIRECTORY, file)
+      const ageMs = now - fs.statSync(fullPath).mtimeMs
+
+      if (ageMs > maxAgeMs) {
+        fs.unlinkSync(fullPath)
+      }
+    }
+  } catch (error) {
+    debug('Failed to cleanup cache directory', error)
+  }
+}
+
+function readPackageVersion(path: string): string {
+  try {
+    return require(path).version ?? 'unknown'
+  } catch (error) {
+    debug(`Failed to read package ${path} version`, error)
+    return 'unknown'
+  }
+}
+
+function isEnabled(value: string | undefined, fallback: boolean): boolean {
+  if (!value) {
+    return fallback
+  }
+  const normalized = value.trim().toLowerCase()
+  return normalized !== '0' && normalized !== 'false' && normalized !== 'off' && normalized !== 'no'
+}
+
+export function clearTransformCache(options: { memory?: boolean; disk?: boolean } = {}) {
+  const { memory = true, disk = true } = options
+
+  if (memory) {
+    memoryCache.clear()
+    optionsSignatureCache = new WeakMap<Record<string, unknown>, string>()
+  }
+
+  if (disk) {
+    try {
+      fs.rmSync(CACHE_DIRECTORY, { recursive: true, force: true })
+    } catch (error) {
+      debug('Failed to clear cache directory', error)
+    }
+
+    cacheDirectoryReady = false
+    cleanupAttempted = false
+  }
+}
+
+export function getTransformCacheDirectory() {
+  return CACHE_DIRECTORY
+}

From b348e02d9f2d34c3d3159dbdb287cceac498d844 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 18:08:20 -0300
Subject: [PATCH 02/10] lockfile

---
 pnpm-lock.yaml | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9a792cb76..1e5b6021b 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -246,6 +246,9 @@ importers:
       debug:
         specifier: ^4.4.1
         version: 4.4.3
+      json-stable-stringify:
+        specifier: ^1.3.0
+        version: 1.3.0
       oxc-resolver:
         specifier: ^11.6.1
         version: 11.19.1
@@ -2661,6 +2664,14 @@ packages:
     resolution: {integrity: sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==}
     engines: {node: '>= 0.4'}
 
+  call-bind@1.0.8:
+    resolution: {integrity: sha512-oKlSFMcMwpUg2ednkhQ454wfWiU/ul3CkJe/PEHcTKuiX6RpbehUiFMXu13HalGZxfUwCQzZG747YXBn1im9ww==}
+    engines: {node: '>= 0.4'}
+
+  call-bound@1.0.4:
+    resolution: {integrity: sha512-+ys997U96po4Kx/ABpBCqhA9EuxJaQWDQg7295H4hBphv3IZg0boBKuwYpt4YXp6MZ5AmZQnU/tyMTlRpaSejg==}
+    engines: {node: '>= 0.4'}
+
   callsites@3.1.0:
     resolution: {integrity: sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==}
     engines: {node: '>=6'}
@@ -2975,6 +2986,10 @@ packages:
   defaults@1.0.4:
     resolution: {integrity: sha512-eFuaLoy/Rxalv2kr+lqMlUnrDWV+3j4pljOIJgLIhI058IQfWJ7vXhyEIHu+HtC738klGALYxOKDO0bQP3tg8A==}
 
+  define-data-property@1.1.4:
+    resolution: {integrity: sha512-rBMvIzlpA8v6E+SJZoo++HAYqsLrkg7MSfIinMPFhmkorw7X+dOXVJQs+QT69zGkzMyfDnIMN2Wid1+NbL3T+A==}
+    engines: {node: '>= 0.4'}
+
   define-lazy-prop@2.0.0:
     resolution: {integrity: sha512-Ds09qNh8yw3khSjiJjiUInaGX9xlqZDY7JVryGxdxV7NPeuqQfplOpQ66yJFZut3jLa5zOwkXw1g9EI2uKh4Og==}
     engines: {node: '>=8'}
@@ -3411,6 +3426,9 @@ packages:
     resolution: {integrity: sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==}
     engines: {node: '>=8'}
 
+  has-property-descriptors@1.0.2:
+    resolution: {integrity: sha512-55JNKuIW+vq4Ke1BjOTjM2YctQIvCT7GFzHwmfZPGo5wnrgkid0YQtnAleFSqumZm4az3n2BS+erby5ipJdgrg==}
+
   has-symbols@1.1.0:
     resolution: {integrity: sha512-1cDNdwJ2Jaohmb3sg4OmKaMBwuC48sYni5HUw2DvsC8LjGTLK9h+eb1X6RyuOHe4hT0ULCW68iomhjUoKUqlPQ==}
     engines: {node: '>= 0.4'}
@@ -3649,6 +3667,9 @@ packages:
   isarray@1.0.0:
     resolution: {integrity: sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==}
 
+  isarray@2.0.5:
+    resolution: {integrity: sha512-xHjhDr3cNBK0BzdUJSPXZntQUx/mwMS5Rw4A7lPJ90XGAO6ISP/ePDNuo0vhqOZU+UD5JoodwCAAoZQd3FeAKw==}
+
   isexe@2.0.0:
     resolution: {integrity: sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==}
 
@@ -3861,6 +3882,10 @@ packages:
   json-schema-traverse@1.0.0:
     resolution: {integrity: sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==}
 
+  json-stable-stringify@1.3.0:
+    resolution: {integrity: sha512-qtYiSSFlwot9XHtF9bD9c7rwKjr+RecWT//ZnPvSmEjpV5mmPOCN4j8UjY5hbjNkOwZ/jQv3J6R1/pL7RwgMsg==}
+    engines: {node: '>= 0.4'}
+
   json-stringify-nice@1.1.4:
     resolution: {integrity: sha512-5Z5RFW63yxReJ7vANgW6eZFGWaQvnPE3WNmZoOJrSkGju2etKA2L5rrOa1sm877TVTFt57A80BH1bArcmlLfPw==}
 
@@ -3878,6 +3903,9 @@ packages:
   jsonfile@6.2.0:
     resolution: {integrity: sha512-FGuPw30AdOIUTRMC2OMRtQV+jkVj2cfPqSeWXv1NEAJ1qZ5zb1X6z1mFhbfOB/iy3ssJCD+3KuZ8r8C3uVFlAg==}
 
+  jsonify@0.0.1:
+    resolution: {integrity: sha512-2/Ki0GcmuqSrgFyelQq9M05y7PS0mEwuIzrf3f1fPqkVDVRvZrPZtVSMHxdgo8Aq0sxAOb/cr2aqqA3LeWHVPg==}
+
   jsonparse@1.3.1:
     resolution: {integrity: sha512-POQXvpdL69+CluYsillJ7SUhKvytYjW9vG/GKpnf+xP8UWgYEM/RaMzHHofbALDiKbbP1W8UEYmgGl39WkPZsg==}
     engines: {'0': node >= 0.2.0}
@@ -4269,6 +4297,10 @@ packages:
       '@swc/core':
         optional: true
 
+  object-keys@1.1.1:
+    resolution: {integrity: sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==}
+    engines: {node: '>= 0.4'}
+
   once@1.4.0:
     resolution: {integrity: sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==}
 
@@ -4732,6 +4764,10 @@ packages:
   set-blocking@2.0.0:
     resolution: {integrity: sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==}
 
+  set-function-length@1.2.2:
+    resolution: {integrity: sha512-pgRc4hJ4/sNjWCSS9AmnS40x3bNMDTknHgL5UaMBTMyJnU90EgWh1Rz+MC9eFu4BuN/UwZjKQuY/1v3rM7HMfg==}
+    engines: {node: '>= 0.4'}
+
   shebang-command@2.0.0:
     resolution: {integrity: sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==}
     engines: {node: '>=8'}
@@ -7797,6 +7833,18 @@ snapshots:
       es-errors: 1.3.0
       function-bind: 1.1.2
 
+  call-bind@1.0.8:
+    dependencies:
+      call-bind-apply-helpers: 1.0.2
+      es-define-property: 1.0.1
+      get-intrinsic: 1.3.0
+      set-function-length: 1.2.2
+
+  call-bound@1.0.4:
+    dependencies:
+      call-bind-apply-helpers: 1.0.2
+      get-intrinsic: 1.3.0
+
   callsites@3.1.0: {}
 
   callsites@4.2.0: {}
@@ -8074,6 +8122,12 @@ snapshots:
     dependencies:
       clone: 1.0.4
 
+  define-data-property@1.1.4:
+    dependencies:
+      es-define-property: 1.0.1
+      es-errors: 1.3.0
+      gopd: 1.2.0
+
   define-lazy-prop@2.0.0: {}
 
   delayed-stream@1.0.0: {}
@@ -8513,6 +8567,10 @@ snapshots:
 
   has-flag@4.0.0: {}
 
+  has-property-descriptors@1.0.2:
+    dependencies:
+      es-define-property: 1.0.1
+
   has-symbols@1.1.0: {}
 
   has-tostringtag@1.0.2:
@@ -8704,6 +8762,8 @@ snapshots:
 
   isarray@1.0.0: {}
 
+  isarray@2.0.5: {}
+
   isexe@2.0.0: {}
 
   isexe@3.1.5: {}
@@ -9099,6 +9159,14 @@ snapshots:
 
   json-schema-traverse@1.0.0: {}
 
+  json-stable-stringify@1.3.0:
+    dependencies:
+      call-bind: 1.0.8
+      call-bound: 1.0.4
+      isarray: 2.0.5
+      jsonify: 0.0.1
+      object-keys: 1.1.1
+
   json-stringify-nice@1.1.4: {}
 
   json-stringify-safe@5.0.1: {}
@@ -9113,6 +9181,8 @@ snapshots:
     optionalDependencies:
       graceful-fs: 4.2.11
 
+  jsonify@0.0.1: {}
+
   jsonparse@1.3.1: {}
 
   just-diff-apply@5.5.0: {}
@@ -9683,6 +9753,8 @@ snapshots:
     transitivePeerDependencies:
       - debug
 
+  object-keys@1.1.1: {}
+
   once@1.4.0:
     dependencies:
       wrappy: 1.0.2
@@ -10160,6 +10232,15 @@ snapshots:
 
   set-blocking@2.0.0: {}
 
+  set-function-length@1.2.2:
+    dependencies:
+      define-data-property: 1.1.4
+      es-errors: 1.3.0
+      function-bind: 1.1.2
+      get-intrinsic: 1.3.0
+      gopd: 1.2.0
+      has-property-descriptors: 1.0.2
+
   shebang-command@2.0.0:
     dependencies:
       shebang-regex: 3.0.0

From 3f3bd1962786368ee2b8b88dd767824180c84e1d Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 18:12:15 -0300
Subject: [PATCH 03/10] code

---
 packages/register/register.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/packages/register/register.ts b/packages/register/register.ts
index c6ee5aeb6..19a159e6a 100644
--- a/packages/register/register.ts
+++ b/packages/register/register.ts
@@ -116,7 +116,6 @@ export function compile(
   // Fast-path before cache work for files intentionally left as runtime JS.
   // This keeps cache logs meaningful and avoids unnecessary key generation.
   if (!fallbackToTs && shouldSkipTransformForRuntimeJs(filename, sourcecode, options)) {
-    logCacheDebug('skip', filename)
     return sourcecode
   }
 

From f873981376ba3765e7f7f436dd7844be52865710 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 19:26:55 -0300
Subject: [PATCH 04/10] fix tests and sourcemap

---
 .gitignore                                    |   3 +
 .../__snapshots__/sourcemaps.spec.ts.md       |   8 +--
 .../__snapshots__/sourcemaps.spec.ts.snap     | Bin 366 -> 377 bytes
 packages/register/README.md                   |   1 -
 .../__test__/register-runtime-tuning.spec.ts  |   4 +-
 .../ts-compiler-options-to-swc-config.spec.ts |  11 ++++
 packages/register/esm.mts                     |  11 +---
 packages/register/read-default-tsconfig.ts    |  34 ++++++++---
 packages/register/register.ts                 |  57 +++---------------
 packages/register/transform-cache.ts          |  37 +++++++++++-
 10 files changed, 94 insertions(+), 72 deletions(-)

diff --git a/.gitignore b/.gitignore
index 71991ede0..e2dc7341d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -165,6 +165,9 @@ Cargo.lock
 # idea
 .idea/
 
+# Serena
+.serena
+
 *.node
 lib
 artifacts
diff --git a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
index cb5c24d3f..706474dd7 100644
--- a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
+++ b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
@@ -8,12 +8,12 @@ Generated by [AVA](https://avajs.dev).
 
 > Snapshot 1
 
-    `Error: ␊
-        at /packages/integrate/__tests__/sourcemaps/sourcemaps.spec.ts:18:26␊
+    `Error␊
+        at <anonymous> (/packages/integrate/__tests__/sourcemaps/sourcemaps.spec.ts:30:5)␊
         at Test.callFn (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/test.js:525:26)␊
         at Test.run (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/test.js:534:33)␊
         at Runner.runSingle (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:280:33)␊
         at Runner.runTest (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:362:30)␊
         at async Promise.all (index 0)␊
-        at file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:515:21␊
-        at Runner.start (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:523:15)`
+        at async file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:515:21␊
+        at async Runner.start (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:523:15)`
diff --git a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.snap b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.snap
index de0c48d27cc39b77bdea62aac4f1a04a2934a6f8..768c29bb40c9863a974a50a562ab79e5fe0bb715 100644
GIT binary patch
literal 377
zcmV-<0fzoTRzV<BZeeh9Xm4~Nb~6eC0B}EldOsu|;})%R9P3->fe0Pt!@+?b^JfyV
zZMN$*-XDty00000000BE&^=GXFc1ddLWPjnn30gjcEC>Jra~4%U0_DQ!W3PTYwFgq
zBcIccu|EZVDT;tX5hJ<jhSU4p-Ro>>T)w2;8wMQ=ZZ2r<8dI>f^GmkYVa~`kKF11b
z(qy5gxeK&=EeZ(m(!c8WPJ3+~o%GI+FZ*}iJAcL)V-VO4SZBADYv`5@L=E{8N+h9e
zz|uoNk!1lXP?m{r<VVY?#+(OIGE(XAEA<&E@EnY}w`?%e29*%Px&pJx6^%g>ytZ{E
zU<H#gAMrRto4Z2WauV^F$MSF(Rv?U?igpveAeAPmO2&tpZ@Qu6NJ+V;9vf@Xx7d@m
zrNRFs{YUnKRB|2tjkcF|L&|ZYWV9!Nwl-%E-c_2AgE4HNZGjv1d!&n9(l}K~eCT}s
XfCBiAK9D9-#p&=J;%fEEZUX=SMGCSQ

literal 366
zcmV-!0g?VeRzV<BZeeh9Xm4~Nb~6eC054xDJu+n`ttE$}9DKJVt>J-=+Tu)^<1<FV
zl@9hs8y|}Z00000000BEkuguhFc5_c6{^I>!ouRQUF<q;s>)Lrm=UlrMQ(g;O&vS(
zIkb%ZDey~iglH*ZBsZLHc=x`0y7%S6`f`K&4~QmO*xlgTH&&Ca4;!*IaZS)Sp@d4+
zXwap;_7V5*TC1p@``7*6px4&fMepi-(7z4A2T3kTDisN<Rk=|sKxSNoRZtOFQAEIq
zMZu2FKSqi*lr*B`Gnq}ljh@m9EtR!*jtrN^f@F+2uc4^CZfpY3+SL_PuWCM}6Uqy4
zrPs!-=3~k!7pLMRW7aHKdkK9(nP+)|jZSEx=>{bxQiucUp>YmE3wuls7XA|%zPuAO
zn~nd5wn@7|ifJar_<&US=1OuOd}R=5dL$Vdr(s8qk}j^ud3r4Wl^df99i`4QA$dOf
M1m};kH&+7y0CMT3u>b%7

diff --git a/packages/register/README.md b/packages/register/README.md
index 6243bfebd..ef0df8120 100644
--- a/packages/register/README.md
+++ b/packages/register/README.md
@@ -141,7 +141,6 @@ Environment variables:
   - default: `${os.tmpdir()}/swc-node-${process.getuid() ?? process.pid}`
 - `SWC_NODE_CACHE_TTL_DAYS=7` disk cache retention in days.
 - `SWC_NODE_CACHE_MEMORY_LIMIT=2000` max in-process transform entries.
-- `SWC_NODE_CACHE_DEBUG=1` print cache hit/miss/store/skip lines to stderr.
 
 Programmatic cache control:
 
diff --git a/packages/register/__test__/register-runtime-tuning.spec.ts b/packages/register/__test__/register-runtime-tuning.spec.ts
index 51aec1bc1..26f693ab9 100644
--- a/packages/register/__test__/register-runtime-tuning.spec.ts
+++ b/packages/register/__test__/register-runtime-tuning.spec.ts
@@ -5,8 +5,8 @@ import * as ts from 'typescript'
 import * as swcCore from '@swc-node/core'
 import { SourcemapMap } from '@swc-node/sourcemap-support'
 
-import { clearTransformCache, compile } from '../register'
-import { clearTransformCacheForTest } from '../transform-cache'
+import { compile } from '../register'
+import { clearTransformCache } from '../transform-cache'
 
 const originalEnv = { ...process.env }
 const emptyMap = '{"version":3,"sources":[],"names":[],"mappings":""}'
diff --git a/packages/register/__test__/ts-compiler-options-to-swc-config.spec.ts b/packages/register/__test__/ts-compiler-options-to-swc-config.spec.ts
index 4bce11e14..3f5dd0ec8 100644
--- a/packages/register/__test__/ts-compiler-options-to-swc-config.spec.ts
+++ b/packages/register/__test__/ts-compiler-options-to-swc-config.spec.ts
@@ -126,3 +126,14 @@ test('should set all values', (t) => {
   }
   t.deepEqual(swcConfig, expected)
 })
+
+test('sourceMap without inlineSourceMap keeps external map output', (t) => {
+  const options: ts.CompilerOptions = {
+    sourceMap: true,
+    inlineSourceMap: false,
+  }
+
+  const swcConfig = tsCompilerOptionsToSwcConfig(options, 'some-file.ts')
+
+  t.is(swcConfig.sourcemap, true)
+})
diff --git a/packages/register/esm.mts b/packages/register/esm.mts
index f2140f131..b851ad637 100644
--- a/packages/register/esm.mts
+++ b/packages/register/esm.mts
@@ -18,6 +18,8 @@ import ts from 'typescript'
 import { readDefaultTsConfig } from '../lib/read-default-tsconfig.js'
 // @ts-expect-error
 import { compile } from '../lib/register.js'
+// @ts-expect-error
+import { shouldSkipTransformForRuntimeJs } from '../lib/transform-cache.js'
 
 const debug = debugFactory('@swc-node')
 
@@ -278,8 +280,6 @@ const tsconfigForSWCNode = {
   baseUrl: undefined,
 }
 
-const ESM_SKIP_COMPILE_EXTENSIONS = new Set(['.js', '.mjs', '.cjs', '.es', '.es6'])
-
 export const load: LoadHook = async (url, context, nextLoad) => {
   debug('load', url, JSON.stringify(context))
 
@@ -320,7 +320,7 @@ export const load: LoadHook = async (url, context, nextLoad) => {
   // like it expects, which at least fixes relative input sourcemap paths.
   const filename = url.startsWith('file:') ? fileURLToPath(url) : url
 
-  if (shouldSkipCompileInEsmLoader(filename)) {
+  if (shouldSkipTransformForRuntimeJs(filename, code, tsconfigForSWCNode.module)) {
     debug('skip compile: runtime js module', url)
     return addShortCircuitSignal({
       format: resolvedFormat,
@@ -356,8 +356,3 @@ const parseUrl =
           return null
         }
       }
-
-function shouldSkipCompileInEsmLoader(filename: string): boolean {
-  const extension = extname(filename).toLowerCase()
-  return ESM_SKIP_COMPILE_EXTENSIONS.has(extension)
-}
diff --git a/packages/register/read-default-tsconfig.ts b/packages/register/read-default-tsconfig.ts
index 94016ffe4..a116d794d 100644
--- a/packages/register/read-default-tsconfig.ts
+++ b/packages/register/read-default-tsconfig.ts
@@ -10,6 +10,29 @@ const debug = debugFactory('@swc-node')
 
 const configCache: Record<string, Partial<ts.CompilerOptions & { fallbackToTs: (path: string) => boolean }>> = {}
 
+// Keep compatibility with the legacy SWC_NODE_INLINE_SOURCE_MAP env by
+// mapping it to SWC_NODE_SOURCE_MAP_MODE=inline.
+if (typeof process.env.SWC_NODE_INLINE_SOURCE_MAP === 'string') {
+  process.env.SWC_NODE_SOURCE_MAP_MODE = 'inline'
+}
+
+export function getSourceMapMode(): { inline: boolean; store: boolean } {
+  switch (process.env.SWC_NODE_SOURCE_MAP_MODE?.trim().toLowerCase()) {
+    case 'both':
+      return { inline: true, store: true }
+    case 'inline':
+      return { inline: true, store: false }
+    case 'store':
+      return { inline: false, store: true }
+    case 'none':
+      return { inline: false, store: false }
+  }
+
+  // In auto mode, follow runtime capability: native source maps favor inline,
+  // non-native stacks favor store mode.
+  return process.sourceMapsEnabled ? { inline: true, store: false } : { inline: false, store: true }
+}
+
 export function readDefaultTsConfig(
   tsConfigPath = process.env.SWC_NODE_PROJECT ?? process.env.TS_NODE_PROJECT ?? join(process.cwd(), 'tsconfig.json'),
 ) {
@@ -123,18 +146,15 @@ export function tsCompilerOptionsToSwcConfig(options: ts.CompilerOptions, filena
   const isJsx = filename.endsWith('.tsx') || filename.endsWith('.jsx') || Boolean(options.jsx)
   const target = options.target ?? ts.ScriptTarget.ES2018
 
-  const enableInlineSourceMap =
-    options.inlineSourceMap ??
-    (typeof process.env.SWC_NODE_INLINE_SOURCE_MAP === 'string'
-      ? Boolean(process.env.SWC_NODE_INLINE_SOURCE_MAP)
-      : undefined)
+  const sourceMapModeName = process.env.SWC_NODE_SOURCE_MAP_MODE?.trim().toLowerCase()
+  const enableInlineSourceMap = options.inlineSourceMap ?? (sourceMapModeName === 'inline' ? true : undefined)
+  const shouldEmitSourceMap = Boolean(options.sourceMap || enableInlineSourceMap)
 
   return {
     module: toModule(options.module ?? ts.ModuleKind.ES2015),
     target: toTsTarget(target),
     jsx: isJsx,
-    // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-    sourcemap: options.sourceMap || enableInlineSourceMap ? 'inline' : Boolean(options.sourceMap),
+    sourcemap: enableInlineSourceMap ? 'inline' : shouldEmitSourceMap,
     experimentalDecorators: options.experimentalDecorators ?? false,
     emitDecoratorMetadata: options.emitDecoratorMetadata ?? false,
     useDefineForClassFields: getUseDefineForClassFields(options, target),
diff --git a/packages/register/register.ts b/packages/register/register.ts
index 19a159e6a..7edc38a64 100644
--- a/packages/register/register.ts
+++ b/packages/register/register.ts
@@ -1,14 +1,15 @@
-import { extname } from 'node:path'
-
 import { Options, transform, transformSync } from '@swc-node/core'
 import { installSourceMapSupport, SourcemapMap } from '@swc-node/sourcemap-support'
 import { addHook } from 'pirates'
 import * as ts from 'typescript'
 
-import { readDefaultTsConfig, tsCompilerOptionsToSwcConfig } from './read-default-tsconfig'
-import { createCacheKey, getCachedTransform, setCachedTransform } from './transform-cache'
-
-const LooksLikeEsmSyntaxRegex = /(?:^|\n)\s*import\s|(?:^|\n)\s*export\s|\bimport\.meta\b/
+import { getSourceMapMode, readDefaultTsConfig, tsCompilerOptionsToSwcConfig } from './read-default-tsconfig'
+import {
+  createCacheKey,
+  getCachedTransform,
+  setCachedTransform,
+  shouldSkipTransformForRuntimeJs,
+} from './transform-cache'
 
 const DEFAULT_EXTENSIONS = new Set([
   ts.Extension.Js,
@@ -23,8 +24,6 @@ const DEFAULT_EXTENSIONS = new Set([
   '.es',
 ])
 
-const JS_RUNTIME_EXTENSIONS = new Set([ts.Extension.Js, ts.Extension.Mjs, ts.Extension.Cjs, '.es6', '.es'])
-
 // Runtime knobs here are process-scoped and comparatively cheap to read, so
 // they gate cache safety without paying per-module deep serialization costs.
 const CacheRuntimeSalt = [
@@ -49,6 +48,7 @@ const injectInlineSourceMap = ({
   // Choose map storage strategy at emit time so one process can tune behavior
   // per runtime profile (debuggability vs memory) without rebuilds.
   const sourceMapMode = getSourceMapMode()
+
   if (sourceMapMode.store) {
     SourcemapMap.set(filename, map)
   }
@@ -115,7 +115,7 @@ export function compile(
 
   // Fast-path before cache work for files intentionally left as runtime JS.
   // This keeps cache logs meaningful and avoids unnecessary key generation.
-  if (!fallbackToTs && shouldSkipTransformForRuntimeJs(filename, sourcecode, options)) {
+  if (!fallbackToTs && shouldSkipTransformForRuntimeJs(filename, sourcecode, options.module)) {
     return sourcecode
   }
 
@@ -187,42 +187,3 @@ export function register(options: Partial<ts.CompilerOptions> = {}, hookOpts = {
     ...hookOpts,
   })
 }
-
-function getSourceMapMode(): { inline: boolean; store: boolean } {
-  switch (process.env.SWC_NODE_SOURCE_MAP_MODE?.trim().toLowerCase()) {
-    case 'both':
-      return { inline: true, store: true }
-    case 'inline':
-      return { inline: true, store: false }
-    case 'store':
-      return { inline: false, store: true }
-    case 'none':
-      return { inline: false, store: false }
-  }
-
-  // In auto mode, follow runtime capability: native source maps favor inline,
-  // non-native stacks favor store mode.
-  return process.sourceMapsEnabled ? { inline: true, store: false } : { inline: false, store: true }
-}
-
-function shouldSkipTransformForRuntimeJs(filename: string, sourcecode: string, options: ts.CompilerOptions): boolean {
-  // Respect SWCRC workflows first. When users opt into external SWC config,
-  // consistency with that config takes priority over local fast-path heuristics.
-  if (process.env.SWCRC) {
-    return false
-  }
-
-  const extension = extname(filename).toLowerCase()
-  if (!JS_RUNTIME_EXTENSIONS.has(extension)) {
-    return false
-  }
-
-  const moduleKind = options.module ?? ts.ModuleKind.ES2015
-  if (moduleKind !== ts.ModuleKind.CommonJS) {
-    return true
-  }
-
-  // CommonJS mode is where accidental ESM-in-JS files usually break at runtime,
-  // so we keep the transform path only when file content indicates that risk.
-  return !LooksLikeEsmSyntaxRegex.test(sourcecode)
-}
diff --git a/packages/register/transform-cache.ts b/packages/register/transform-cache.ts
index d8614366f..0b6064903 100644
--- a/packages/register/transform-cache.ts
+++ b/packages/register/transform-cache.ts
@@ -1,10 +1,15 @@
 import fs from 'node:fs'
+import path from 'node:path'
+import * as ts from 'typescript'
 import { createHash } from 'node:crypto'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import debugFactory from 'debug'
+import stableStringify from 'json-stable-stringify'
 
-const stableStringify = require('json-stable-stringify') as (value: unknown) => string
+const LOOKS_LIKE_ESM_SYNTAX_REGEX = /(?:^|\n)\s*import\s|(?:^|\n)\s*export\s|\bimport\.meta\b/
+
+const JS_RUNTIME_EXTENSIONS = new Set([ts.Extension.Js, ts.Extension.Mjs, ts.Extension.Cjs, '.es6', '.es'])
 
 interface TransformCacheEntry {
   code: string
@@ -94,7 +99,7 @@ function getOptionsSignature(options: Record<string, unknown>): string {
 
   // Options are usually reused for most compiles in one process; cache the
   // normalized signature so hash generation stays near O(source length).
-  const signature = stableStringify(options)
+  const signature = stableStringify(options)!
   optionsSignatureCache.set(options, signature)
   return signature
 }
@@ -219,3 +224,31 @@ export function clearTransformCache(options: { memory?: boolean; disk?: boolean
 export function getTransformCacheDirectory() {
   return CACHE_DIRECTORY
 }
+
+export function shouldSkipTransformForRuntimeJs(
+  filename: string,
+  sourcecode: string,
+  moduleKind: ts.ModuleKind = ts.ModuleKind.ES2015,
+  swcrcEnabled: boolean = Boolean(process.env.SWCRC),
+): boolean {
+  // Respect SWCRC workflows first. When users opt into external SWC config,
+  // consistency with that config takes priority over local fast-path heuristics.
+  if (swcrcEnabled) {
+    return false
+  }
+
+  const extension = path.extname(filename).toLowerCase()
+  if (!JS_RUNTIME_EXTENSIONS.has(extension)) {
+    return false
+  }
+
+  // In non-CommonJS output modes, runtime JS files are already executable for
+  // Node, so compiling them again mostly adds overhead.
+  if (moduleKind !== ts.ModuleKind.CommonJS) {
+    return true
+  }
+
+  // CommonJS mode is where accidental ESM-in-JS files usually break at runtime,
+  // so we keep the transform path only when file content indicates that risk.
+  return !LOOKS_LIKE_ESM_SYNTAX_REGEX.test(sourcecode)
+}

From 549e696b281f26874371ad10895331c3e011a55f Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 19:31:49 -0300
Subject: [PATCH 05/10] simplify code

---
 packages/register/README.md          |  4 +--
 packages/register/transform-cache.ts | 39 ++--------------------------
 2 files changed, 3 insertions(+), 40 deletions(-)

diff --git a/packages/register/README.md b/packages/register/README.md
index ef0df8120..0558c65c7 100644
--- a/packages/register/README.md
+++ b/packages/register/README.md
@@ -137,9 +137,7 @@ And if failed to parse `tsconfig.json`, `@swc-node/register` will print warning
 Environment variables:
 
 - `SWC_NODE_CACHE=0` disable cache.
-- `SWC_NODE_CACHE_DIR=/path/to/cache` choose disk cache directory.
-  - default: `${os.tmpdir()}/swc-node-${process.getuid() ?? process.pid}`
-- `SWC_NODE_CACHE_TTL_DAYS=7` disk cache retention in days.
+- `SWC_NODE_CACHE_DIR=./path/to/cache` choose disk cache directory.
 - `SWC_NODE_CACHE_MEMORY_LIMIT=2000` max in-process transform entries.
 
 Programmatic cache control:
diff --git a/packages/register/transform-cache.ts b/packages/register/transform-cache.ts
index 0b6064903..f94aab901 100644
--- a/packages/register/transform-cache.ts
+++ b/packages/register/transform-cache.ts
@@ -42,7 +42,6 @@ const SWC_VERSION = readPackageVersion('@swc/core/package.json')
 const memoryCache = new Map<string, TransformCacheEntry>()
 let optionsSignatureCache = new WeakMap<Record<string, unknown>, string>()
 let cacheDirectoryReady = false
-let cleanupAttempted = false
 
 export function getCachedTransform(cacheKey: string): TransformCacheEntry | undefined {
   if (!CACHE_ENABLED) {
@@ -146,42 +145,8 @@ function ensureCacheDirectory() {
     cacheDirectoryReady = true
   }
 
-  if (!cleanupAttempted) {
-    cleanupAttempted = true
-
-    // Trigger cleanup only after cache is actually used, so startup work stays
-    // minimal for short-lived commands.
-    void cleanupStaleDiskCache()
-  }
-}
-
-async function cleanupStaleDiskCache() {
-  if (!Number.isFinite(CACHE_TTL_DAYS) || CACHE_TTL_DAYS <= 0) {
-    return
-  }
-
-  try {
-    const files = fs.readdirSync(CACHE_DIRECTORY)
-    const now = Date.now()
-    const maxAgeMs = CACHE_TTL_DAYS * 24 * 60 * 60 * 1000
-
-    // Age-based eviction keeps disk usage stable without maintaining additional metadata files.
-    for (const file of files) {
-      if (!file.endsWith('.json')) {
-        // Non-cache files should not be touched, and may indicate a non-standard cache setup (e.g. with a symlink).
-        return
-      }
-
-      const fullPath = join(CACHE_DIRECTORY, file)
-      const ageMs = now - fs.statSync(fullPath).mtimeMs
-
-      if (ageMs > maxAgeMs) {
-        fs.unlinkSync(fullPath)
-      }
-    }
-  } catch (error) {
-    debug('Failed to cleanup cache directory', error)
-  }
+  // Note that we do not attempt to clean up old cache files since we store it
+  // on tmpdir and we assume the OS take care of that.
 }
 
 function readPackageVersion(path: string): string {

From f84f6845042adfddb2315eaba7edd7466695112a Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 19:32:06 -0300
Subject: [PATCH 06/10] remove old test

---
 .../__test__/register-runtime-tuning.spec.ts  | 22 -------------------
 1 file changed, 22 deletions(-)

diff --git a/packages/register/__test__/register-runtime-tuning.spec.ts b/packages/register/__test__/register-runtime-tuning.spec.ts
index 26f693ab9..b10c0e8bf 100644
--- a/packages/register/__test__/register-runtime-tuning.spec.ts
+++ b/packages/register/__test__/register-runtime-tuning.spec.ts
@@ -159,25 +159,3 @@ test.serial('skips transform for runtime js in esm mode', async (t) => {
   t.is(output, 'export const value = 42')
   t.false(transformStub.called)
 })
-
-test.serial('can clear transform cache programmatically', (t) => {
-  const transformSyncStub = sinon.stub(swcCore, 'transformSync').returns({
-    code: 'console.log("clear-cache")',
-    map: emptyMap,
-  })
-
-  const filename = uniquePath('clear-cache', 'ts')
-  const options = {
-    module: ts.ModuleKind.CommonJS,
-    sourceMap: true,
-  }
-
-  compile('const value: number = 1', filename, options)
-  compile('const value: number = 1', filename, options)
-  t.is(transformSyncStub.callCount, 1)
-
-  clearTransformCache({ memory: true, disk: true })
-
-  compile('const value: number = 1', filename, options)
-  t.is(transformSyncStub.callCount, 2)
-})

From d86ce44a46c31f7c10a72d518734acbc532632cc Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 19:43:50 -0300
Subject: [PATCH 07/10] fix unused code

---
 packages/register/transform-cache.ts | 2 --
 1 file changed, 2 deletions(-)

diff --git a/packages/register/transform-cache.ts b/packages/register/transform-cache.ts
index f94aab901..7b1fdd262 100644
--- a/packages/register/transform-cache.ts
+++ b/packages/register/transform-cache.ts
@@ -29,7 +29,6 @@ const debug = debugFactory('@swc-node')
 const CACHE_ENABLED = isEnabled(process.env.SWC_NODE_CACHE, true)
 const CACHE_DIRECTORY =
   process.env.SWC_NODE_CACHE_DIR ?? join(tmpdir(), `swc-node-${process.getuid?.() ?? process.pid}`)
-const CACHE_TTL_DAYS = Number(process.env.SWC_NODE_CACHE_TTL_DAYS ?? '7')
 const MEMORY_CACHE_LIMIT = Number(process.env.SWC_NODE_CACHE_MEMORY_LIMIT ?? '2000')
 
 if (!Number.isFinite(MEMORY_CACHE_LIMIT) || MEMORY_CACHE_LIMIT < 0) {
@@ -182,7 +181,6 @@ export function clearTransformCache(options: { memory?: boolean; disk?: boolean
     }
 
     cacheDirectoryReady = false
-    cleanupAttempted = false
   }
 }
 

From 7665d2964b4035cd1824b1c65df21f7a52d7fd85 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 21:03:01 -0300
Subject: [PATCH 08/10] Minify code to reduce cache size

---
 packages/core/index.ts                        |   9 ++++-
 .../__snapshots__/react-pragma.spec.ts.md     |  16 ++------
 .../__snapshots__/react-pragma.spec.ts.snap   | Bin 715 -> 382 bytes
 .../__snapshots__/sourcemaps.spec.ts.md       |   2 +-
 .../__snapshots__/sourcemaps.spec.ts.snap     | Bin 377 -> 378 bytes
 .../jest/__test__/hoist-top-level.spec.ts.md  |  36 +-----------------
 .../__test__/hoist-top-level.spec.ts.snap     | Bin 1241 -> 943 bytes
 packages/register/transform-cache.ts          |  10 ++---
 8 files changed, 19 insertions(+), 54 deletions(-)

diff --git a/packages/core/index.ts b/packages/core/index.ts
index c9d7fac55..2d7356611 100644
--- a/packages/core/index.ts
+++ b/packages/core/index.ts
@@ -61,6 +61,12 @@ function transformOption(path: string, options?: Options, jest = false): SwcOpti
               jest,
             },
           },
+          minify: {
+            compress: true,
+            // Keep class and function names because debuggers don't use the `names` property from the source map
+            mangle: false,
+            inlineSourcesContent: true,
+          },
           keepClassNames: opts.keepClassNames,
           paths: opts.paths,
           baseUrl: opts.baseUrl,
@@ -68,7 +74,8 @@ function transformOption(path: string, options?: Options, jest = false): SwcOpti
             keepImportAttributes: true,
           },
         },
-    minify: false,
+    // Smaller output for cache
+    minify: true,
     isModule: true,
     module: options?.swc?.swcrc
       ? undefined
diff --git a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
index b8a057dc8..e44ee185e 100644
--- a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
+++ b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
@@ -9,21 +9,11 @@ Generated by [AVA](https://avajs.dev).
 > Snapshot 1
 
     `"use strict";␊
-    const Button = ({ text })=>/*#__PURE__*/ h("div", null, text);␊
-    ␊
-    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QudHN4Il0sInNvdXJjZXNDb250ZW50IjpbIlxuICBjb25zdCBCdXR0b24gPSAoeyB0ZXh0IH0pID0+IChcbiAgICA8ZGl2PlxuICAgICAge3RleHR9XG4gICAgPC9kaXY+XG4gIClcbiJdLCJuYW1lcyI6WyJCdXR0b24iLCJ0ZXh0IiwiZGl2Il0sIm1hcHBpbmdzIjoiO0FBQ0UsTUFBTUEsU0FBUyxDQUFDLEVBQUVDLElBQUksRUFBRSxpQkFDdEIsRUFBQ0MsYUFDRUQifQ==`
+    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9`
 
 ## should transform jsx into new jsx runtime
 
 > Snapshot 1
 
-    `"use strict";␊
-    Object.defineProperty(exports, "__esModule", {␊
-        value: true␊
-    });␊
-    const _jsxruntime = require("react/jsx-runtime");␊
-    const Button = ({ text })=>/*#__PURE__*/ (0, _jsxruntime.jsx)("div", {␊
-            children: text␊
-        });␊
-    ␊
-    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QudHN4Il0sInNvdXJjZXNDb250ZW50IjpbIlxuICBjb25zdCBCdXR0b24gPSAoeyB0ZXh0IH0pID0+IChcbiAgICA8ZGl2PlxuICAgICAge3RleHR9XG4gICAgPC9kaXY+XG4gIClcbiJdLCJuYW1lcyI6WyJCdXR0b24iLCJ0ZXh0IiwiZGl2Il0sIm1hcHBpbmdzIjoiOzs7OztBQUNFLE1BQU1BLFNBQVMsQ0FBQyxFQUFFQyxJQUFJLEVBQUUsaUJBQ3RCLHFCQUFDQztrQkFDRUQifQ==`
+    `"use strict";Object.defineProperty(exports,"__esModule",{value:!0}),require("react/jsx-runtime");␊
+    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9`
diff --git a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.snap b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.snap
index bb8862a00b02ace36843d91cf3059c43cf5094fd..b92c8cb7113216a5fe2802ed39344ee998eaf350 100644
GIT binary patch
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zfU^?F&t{1AC=3Y_JUr%rh<lra=u(&oQSPa@<7y^cyqFMh1?Y2#160TdDX{{I=;Y;R
zzW5I$7NpXzi%-R8aR=wtOd9SI6Br=xGFy|CpZ){;SHLFh!%e~kkbSk=u83TbyJ}xH
xhCODaFvpQ9;8jJ|Mb@_vTg<j}*{GRHx1%a4+(yEK6yzPaKLORUC9&HC001%9R^I>s

diff --git a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
index 706474dd7..be72301fb 100644
--- a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
+++ b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.md
@@ -9,7 +9,7 @@ Generated by [AVA](https://avajs.dev).
 > Snapshot 1
 
     `Error␊
-        at <anonymous> (/packages/integrate/__tests__/sourcemaps/sourcemaps.spec.ts:30:5)␊
+        at <anonymous> (/packages/integrate/__tests__/sourcemaps/sourcemaps.spec.ts:30:9)␊
         at Test.callFn (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/test.js:525:26)␊
         at Test.run (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/test.js:534:33)␊
         at Runner.runSingle (file:///node_modules/.pnpm/ava@6.4.1_encoding@0.1.13/node_modules/ava/lib/runner.js:280:33)␊
diff --git a/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.snap b/packages/integrate/__tests__/sourcemaps/__snapshots__/sourcemaps.spec.ts.snap
index 768c29bb40c9863a974a50a562ab79e5fe0bb715..35b7da592c04609f071e3d9cdbf14b77627c7c51 100644
GIT binary patch
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zof`a4(tl*nNhR0O-)M7bJER;YN=ADUXk&Bs=v}D^IT*uw+7`HGzen2GC5=;+#D~u3
Y4=8|d=>usZRh;(U0Z}Dp9&Q5w07KNUdjJ3c

literal 377
zcmV-<0fzoTRzV<BZeeh9Xm4~Nb~6eC0B}EldOsu|;})%R9P3->fe0Pt!@+?b^JfyV
zZMN$*-XDty00000000BE&^=GXFc1ddLWPjnn30gjcEC>Jra~4%U0_DQ!W3PTYwFgq
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zz|uoNk!1lXP?m{r<VVY?#+(OIGE(XAEA<&E@EnY}w`?%e29*%Px&pJx6^%g>ytZ{E
zU<H#gAMrRto4Z2WauV^F$MSF(Rv?U?igpveAeAPmO2&tpZ@Qu6NJ+V;9vf@Xx7d@m
zrNRFs{YUnKRB|2tjkcF|L&|ZYWV9!Nwl-%E-c_2AgE4HNZGjv1d!&n9(l}K~eCT}s
XfCBiAK9D9-#p&=J;%fEEZUX=SMGCSQ

diff --git a/packages/jest/__test__/hoist-top-level.spec.ts.md b/packages/jest/__test__/hoist-top-level.spec.ts.md
index 7e2acf675..6a5523e76 100644
--- a/packages/jest/__test__/hoist-top-level.spec.ts.md
+++ b/packages/jest/__test__/hoist-top-level.spec.ts.md
@@ -8,37 +8,5 @@ Generated by [AVA](https://avajs.dev).
 
 > Snapshot 1
 
-    `"use strict";␊
-    jest.enableAutomock();␊
-    jest.disableAutomock();␊
-    jest.mock('./foo');␊
-    jest.mock('./foo/bar', ()=>'bar');␊
-    jest.deepUnmock('./foo');␊
-    jest.mock('./foo').mock('./bar');␊
-    const foo = 'foo';␊
-    console.log(foo);␊
-    jest.unmock('./bar/foo').dontMock('./bar/bar');␊
-    const func = ()=>{␊
-        jest.unmock('./foo');␊
-        jest.mock('./bar');␊
-        jest.mock('./bar/foo', ()=>'foo');␊
-        jest.unmock('./foo/bar');␊
-        jest.deepUnmock('./bar');␊
-        jest.mock('./foo').mock('./bar');␊
-        const bar = 'bar';␊
-        console.log(bar);␊
-        jest.unmock('./bar/foo').dontMock('./bar/bar');␊
-    };␊
-    const func2 = ()=>{␊
-        jest.mock('./bar');␊
-        jest.unmock('./foo/bar');␊
-        jest.mock('./bar/foo', ()=>'foo');␊
-        jest.unmock('./foo');␊
-        jest.deepUnmock('./bar');␊
-        jest.mock('./foo').mock('./bar');␊
-        const bar = 'bar';␊
-        console.log(bar);␊
-        jest.unmock('./bar/foo').dontMock('./bar/bar');␊
-    };␊
-    ␊
-    //# sourceMappingURL=data:application/json;base64,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`
+    `"use strict";console.log("foo"),jest.enableAutomock(),jest.disableAutomock(),jest.mock("./foo"),jest.mock("./foo/bar",()=>"bar"),jest.unmock("./bar/foo").dontMock("./bar/bar"),jest.deepUnmock("./foo"),jest.mock("./foo").mock("./bar");␊
+    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImplc3Quc3BlYy50cyJdLCJzb3VyY2VzQ29udGVudCI6WyJcbmNvbnN0IGZvbyA9ICdmb28nXG5jb25zb2xlLmxvZyhmb28pXG5qZXN0LmVuYWJsZUF1dG9tb2NrKClcbmplc3QuZGlzYWJsZUF1dG9tb2NrKClcbmplc3QubW9jaygnLi9mb28nKVxuamVzdC5tb2NrKCcuL2Zvby9iYXInLCAoKSA9PiAnYmFyJylcbmplc3QudW5tb2NrKCcuL2Jhci9mb28nKS5kb250TW9jaygnLi9iYXIvYmFyJylcbmplc3QuZGVlcFVubW9jaygnLi9mb28nKVxuamVzdC5tb2NrKCcuL2ZvbycpLm1vY2soJy4vYmFyJylcbmNvbnN0IGZ1bmMgPSAoKSA9PiB7XG4gIGNvbnN0IGJhciA9ICdiYXInXG4gIGNvbnNvbGUubG9nKGJhcilcbiAgamVzdC51bm1vY2soJy4vZm9vJylcbiAgamVzdC5tb2NrKCcuL2JhcicpXG4gIGplc3QubW9jaygnLi9iYXIvZm9vJywgKCkgPT4gJ2ZvbycpXG4gIGplc3QudW5tb2NrKCcuL2Zvby9iYXInKVxuICBqZXN0LnVubW9jaygnLi9iYXIvZm9vJykuZG9udE1vY2soJy4vYmFyL2JhcicpXG4gIGplc3QuZGVlcFVubW9jaygnLi9iYXInKVxuICBqZXN0Lm1vY2soJy4vZm9vJykubW9jaygnLi9iYXInKVxufVxuY29uc3QgZnVuYzIgPSAoKSA9PiB7XG4gIGNvbnN0IGJhciA9ICdiYXInXG4gIGNvbnNvbGUubG9nKGJhcilcbiAgamVzdC5tb2NrKCcuL2JhcicpXG4gIGplc3QudW5tb2NrKCcuL2Zvby9iYXInKVxuICBqZXN0Lm1vY2soJy4vYmFyL2ZvbycsICgpID0+ICdmb28nKVxuICBqZXN0LnVubW9jaygnLi9mb28nKVxuICBqZXN0LnVubW9jaygnLi9iYXIvZm9vJykuZG9udE1vY2soJy4vYmFyL2JhcicpXG4gIGplc3QuZGVlcFVubW9jaygnLi9iYXInKVxuICBqZXN0Lm1vY2soJy4vZm9vJykubW9jaygnLi9iYXInKVxufVxuIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciLCJqZXN0IiwiZW5hYmxlQXV0b21vY2siLCJkaXNhYmxlQXV0b21vY2siLCJtb2NrIiwidW5tb2NrIiwiZG9udE1vY2siLCJkZWVwVW5tb2NrIl0sIm1hcHBpbmdzIjoiYUFFQUEsUUFBUUMsR0FBRyxDQURDLE9BRVpDLEtBQUtDLGNBQWMsR0FDbkJELEtBQUtFLGVBQWUsR0FDcEJGLEtBQUtHLElBQUksQ0FBQyxTQUNWSCxLQUFLRyxJQUFJLENBQUMsWUFBYSxJQUFNLE9BQzdCSCxLQUFLSSxNQUFNLENBQUMsYUFBYUMsUUFBUSxDQUFDLGFBQ2xDTCxLQUFLTSxVQUFVLENBQUMsU0FDaEJOLEtBQUtHLElBQUksQ0FBQyxTQUFTQSxJQUFJLENBQUMifQ==`
diff --git a/packages/jest/__test__/hoist-top-level.spec.ts.snap b/packages/jest/__test__/hoist-top-level.spec.ts.snap
index 20421b40baa1c7038d23f5db65628d733f9563c6..3e0314a2ee5fa3b8a993c0ea338876cb061034ce 100644
GIT binary patch
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literal 1241
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D#F28?

diff --git a/packages/register/transform-cache.ts b/packages/register/transform-cache.ts
index 7b1fdd262..98d7f0ff5 100644
--- a/packages/register/transform-cache.ts
+++ b/packages/register/transform-cache.ts
@@ -130,12 +130,12 @@ function readDiskCache(key: string): TransformCacheEntry | undefined {
 }
 
 function writeDiskCache(key: string, value: TransformCacheEntry) {
-  try {
-    ensureCacheDirectory()
-    fs.writeFileSync(join(CACHE_DIRECTORY, `${key}.json`), JSON.stringify(value), 'utf8')
-  } catch (error) {
+  ensureCacheDirectory()
+
+  // Ensure writes are non blocking
+  void fs.promises.writeFile(join(CACHE_DIRECTORY, `${key}.json`), JSON.stringify(value), 'utf8').catch((error) => {
     debug('Failed to write cache file', error)
-  }
+  })
 }
 
 function ensureCacheDirectory() {

From ae2d71626191cf9e2f64aa5b7662637842f218b9 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 21:11:19 -0300
Subject: [PATCH 09/10] fix option

---
 packages/core/index.ts | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/packages/core/index.ts b/packages/core/index.ts
index 2d7356611..421f9930d 100644
--- a/packages/core/index.ts
+++ b/packages/core/index.ts
@@ -61,12 +61,7 @@ function transformOption(path: string, options?: Options, jest = false): SwcOpti
               jest,
             },
           },
-          minify: {
-            compress: true,
-            // Keep class and function names because debuggers don't use the `names` property from the source map
-            mangle: false,
-            inlineSourcesContent: true,
-          },
+          minify: false,
           keepClassNames: opts.keepClassNames,
           paths: opts.paths,
           baseUrl: opts.baseUrl,

From fac40ee73c61270e676397bfb8d7173182facbc6 Mon Sep 17 00:00:00 2001
From: Arthur Fiorette <me@arthur.place>
Date: Fri, 13 Mar 2026 21:22:28 -0300
Subject: [PATCH 10/10] fix minify config

---
 packages/core/index.ts                         |   1 -
 .../__snapshots__/react-pragma.spec.ts.md      |   8 ++++----
 .../__snapshots__/react-pragma.spec.ts.snap    | Bin 382 -> 690 bytes
 .../jest/__test__/hoist-top-level.spec.ts.md   |   4 ++--
 .../jest/__test__/hoist-top-level.spec.ts.snap | Bin 943 -> 1244 bytes
 5 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/packages/core/index.ts b/packages/core/index.ts
index 421f9930d..d38f8f526 100644
--- a/packages/core/index.ts
+++ b/packages/core/index.ts
@@ -61,7 +61,6 @@ function transformOption(path: string, options?: Options, jest = false): SwcOpti
               jest,
             },
           },
-          minify: false,
           keepClassNames: opts.keepClassNames,
           paths: opts.paths,
           baseUrl: opts.baseUrl,
diff --git a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
index e44ee185e..48132b3f2 100644
--- a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
+++ b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.md
@@ -8,12 +8,12 @@ Generated by [AVA](https://avajs.dev).
 
 > Snapshot 1
 
-    `"use strict";␊
-    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9`
+    `"use strict";const Button=({text})=>h("div",null,text);␊
+    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QudHN4Il0sInNvdXJjZXNDb250ZW50IjpbIlxuICBjb25zdCBCdXR0b24gPSAoeyB0ZXh0IH0pID0+IChcbiAgICA8ZGl2PlxuICAgICAge3RleHR9XG4gICAgPC9kaXY+XG4gIClcbiJdLCJuYW1lcyI6WyJCdXR0b24iLCJ0ZXh0IiwiZGl2Il0sIm1hcHBpbmdzIjoiYUFDRSxNQUFNQSxPQUFTLENBQUMsQ0FBRUMsSUFBSSxDQUFFLEdBQ3RCLEVBQUNDLFdBQ0VEIn0=`
 
 ## should transform jsx into new jsx runtime
 
 > Snapshot 1
 
-    `"use strict";Object.defineProperty(exports,"__esModule",{value:!0}),require("react/jsx-runtime");␊
-    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiJ9`
+    `"use strict";Object.defineProperty(exports,"__esModule",{value:true});const _jsxruntime=require("react/jsx-runtime");const Button=({text})=>(0,_jsxruntime.jsx)("div",{children:text});␊
+    //# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QudHN4Il0sInNvdXJjZXNDb250ZW50IjpbIlxuICBjb25zdCBCdXR0b24gPSAoeyB0ZXh0IH0pID0+IChcbiAgICA8ZGl2PlxuICAgICAge3RleHR9XG4gICAgPC9kaXY+XG4gIClcbiJdLCJuYW1lcyI6WyJCdXR0b24iLCJ0ZXh0IiwiZGl2Il0sIm1hcHBpbmdzIjoicUhBQ0UsTUFBTUEsT0FBUyxDQUFDLENBQUVDLElBQUksQ0FBRSxHQUN0QixvQkFBQ0MsZ0JBQ0VEIn0=`
diff --git a/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.snap b/packages/integrate/__tests__/react-pragma/__snapshots__/react-pragma.spec.ts.snap
index b92c8cb7113216a5fe2802ed39344ee998eaf350..8c03308b8a9e4c19546c74eae43d2b8c3f175edf 100644
GIT binary patch
literal 690
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Y%3f&D23;`)#!viy0FTfBe}@DB0A$fiRR910

literal 382
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diff --git a/packages/jest/__test__/hoist-top-level.spec.ts.md b/packages/jest/__test__/hoist-top-level.spec.ts.md
index 6a5523e76..420e5a6af 100644
--- a/packages/jest/__test__/hoist-top-level.spec.ts.md
+++ b/packages/jest/__test__/hoist-top-level.spec.ts.md
@@ -8,5 +8,5 @@ Generated by [AVA](https://avajs.dev).
 
 > Snapshot 1
 
-    `"use strict";console.log("foo"),jest.enableAutomock(),jest.disableAutomock(),jest.mock("./foo"),jest.mock("./foo/bar",()=>"bar"),jest.unmock("./bar/foo").dontMock("./bar/bar"),jest.deepUnmock("./foo"),jest.mock("./foo").mock("./bar");␊
-    //# sourceMappingURL=data:application/json;base64,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`
+    `"use strict";jest.enableAutomock();jest.disableAutomock();jest.mock("./foo");jest.mock("./foo/bar",()=>"bar");jest.deepUnmock("./foo");jest.mock("./foo").mock("./bar");const foo="foo";console.log(foo);jest.unmock("./bar/foo").dontMock("./bar/bar");const func=()=>{jest.unmock("./foo");jest.mock("./bar");jest.mock("./bar/foo",()=>"foo");jest.unmock("./foo/bar");jest.deepUnmock("./bar");jest.mock("./foo").mock("./bar");const bar="bar";console.log(bar);jest.unmock("./bar/foo").dontMock("./bar/bar")};const func2=()=>{jest.mock("./bar");jest.unmock("./foo/bar");jest.mock("./bar/foo",()=>"foo");jest.unmock("./foo");jest.deepUnmock("./bar");jest.mock("./foo").mock("./bar");const bar="bar";console.log(bar);jest.unmock("./bar/foo").dontMock("./bar/bar")};␊
+    //# sourceMappingURL=data:application/json;base64,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`
diff --git a/packages/jest/__test__/hoist-top-level.spec.ts.snap b/packages/jest/__test__/hoist-top-level.spec.ts.snap
index 3e0314a2ee5fa3b8a993c0ea338876cb061034ce..fe569d3aaf63132de9af888c81e25deddb603eea 100644
GIT binary patch
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