Merge pull request #624 from marp-team/enable-compile-cache

Enable Node.js compile cache on CLI when `module.enableCompileCache()` is available

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Make faster launching CLI on Node.js 22.8.0 and later, by enabling Node.js compile cache with `module.enableCompileCache()` ([#624](https://github.com/marp-team/marp-cli/pull/624))
+
 ### Changed
 
 - Upgrade dependent packages to the latest versions ([#623](https://github.com/marp-team/marp-cli/pull/623))

src/patch.ts

@@ -1,8 +1,19 @@
+import module from 'node:module'
 import { isStandaloneBinary } from './utils/binary'
 import { debug } from './utils/debug'
 
 export const patch = () => {
   patchSegmenter()
+  enableCompileCache()
+}
+
+export const enableCompileCache = () => {
+  try {
+    // enableCompileCache() is available only in Node.js 22.8.0 and later
+    ;(module as any).enableCompileCache?.()
+  } catch {
+    // no ops
+  }
 }
 
 export const patchSegmenter = () => {

test/patch.ts

@@ -13,6 +13,13 @@ afterEach(() => {
 })
 
 describe('patch()', () => {
+  it('calls enableCompileCache()', () => {
+    jest.spyOn(patch, 'enableCompileCache')
+
+    patch.patch()
+    expect(patch.enableCompileCache).toHaveBeenCalled()
+  })
+
   it('calls patchSegmenter()', () => {
     jest.spyOn(patch, 'patchSegmenter')
 
@@ -21,6 +28,39 @@ describe('patch()', () => {
   })
 })
 
+describe('enableCompileCache()', () => {
+  beforeEach(() => {
+    jest.resetModules()
+  })
+
+  const enableCompileCache = async () =>
+    (await import('../src/patch')).enableCompileCache()
+
+  it('calls module.enableCompileCache()', async () => {
+    const mock = jest.fn()
+    jest.doMock('node:module', () => ({ enableCompileCache: mock }))
+
+    await enableCompileCache()
+    expect(mock).toHaveBeenCalled()
+  })
+
+  it('ignores error raised from module.enableCompileCache()', async () => {
+    jest.doMock('node:module', () => ({
+      enableCompileCache: jest.fn(() => {
+        throw new Error('test')
+      }),
+    }))
+
+    expect(enableCompileCache).not.toThrow()
+  })
+
+  it('does nothing if module.enableCompileCache is not defined (for older versions of Node.js)', async () => {
+    jest.doMock('node:module', () => ({}))
+
+    expect(enableCompileCache).not.toThrow()
+  })
+})
+
 describe('patchSegmenter()', () => {
   const originalVariables = process.config.variables