Workaround for loading ESM

bench/esm/import-chalk.js

@@ -0,0 +1,5 @@
+(async () => {
+  // Evaluating the dynamic import is a workaround for loading ESM in CJS files
+  const { default: chalk } = await (Function(`return import("chalk")`)());
+  console.log(chalk.blue("Hello World"));
+})();

bench/esm/import-local-file.js

@@ -0,0 +1,5 @@
+(async () => {
+  // Evaluating the dynamic import is a workaround for loading ESM in CJS files
+  const {default: log} = await (Function(`return import("./local-file.mjs")`)());
+  log();
+})();

bench/esm/local-file.mjs

@@ -0,0 +1,3 @@
+export default function () {
+  console.log('Hello World')
+}

bench/require-import-chalk.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+'use strict';
+
+const WITH_CACHE = true;
+
+require('./_measure.js')('require-chalk', WITH_CACHE, () => {
+  // Node introduced support for dynamics import in v12
+  const NODE_MAJOR_VERSION = process.versions.node.split('.')[0];
+  if (NODE_MAJOR_VERSION < 12) {
+    return;
+  }
+
+  process.argv.push('config', 'get', 'init.author.name');
+  require('./esm/import-chalk.js');
+});

bench/require-import-local-file.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+'use strict';
+
+const WITH_CACHE = true;
+
+require('./_measure.js')('require-local-file', WITH_CACHE, () => {
+  // Node introduced support for dynamics import in v12
+  const NODE_MAJOR_VERSION = process.versions.node.split('.')[0];
+  if (NODE_MAJOR_VERSION < 12) {
+    return;
+  }
+
+  process.argv.push('config', 'get', 'init.author.name');
+  require('./esm/import-local-file.js');
+});

package.json

@@ -22,6 +22,7 @@
   "dependencies": {},
   "devDependencies": {
     "babel-core": "6.26.3",
+    "chalk": "^5.3.0",
     "eslint": "^7.12.1",
     "flow-parser": "0.136.0",
     "rimraf": "^2.5.4",

sandbox-esm/index.js

@@ -0,0 +1,5 @@
+(async () => {
+  require("../v8-compile-cache.js");
+  require('../bench/esm/import-chalk.js');
+  require('./requires-local-file/requires-local-file.js');
+})();

v8-compile-cache.js

@@ -237,12 +237,35 @@ class NativeCompileCache {
 
     var buffer = this._cacheStore.get(filename, invalidationKey);
 
+    var _this = this;
+
     var script = new vm.Script(wrapper, {
       filename: filename,
       lineOffset: 0,
       displayErrors: true,
       cachedData: buffer,
       produceCachedData: true,
+      // Allow importing ESM with import() (otherwise throws "A dynamic import callback was not specified.")
+      // See https://nodejs.org/dist/latest-v20.x/docs/api/vm.html#new-vmscriptcode-options
+      // See https://github.com/nodejs/node/blob/3a6a80a4e1ad3fc3f1b181e1c94ecfd0b17e6dd1/test/parallel/test-vm-module-dynamic-import.js#L10
+      importModuleDynamically: function(specifier) {
+        // Disable cache if script uses dynamic imports (otherwise throws "Invalid host defined options")
+        _this._cacheStore.delete(filename);
+
+        // Resolve specifier in filename directory to allow importing local files
+        // There might be other paths to be included here
+        var paths = [
+          path.dirname(filename)
+        ].concat(require.resolve.paths(filename))
+        var resolved = require.resolve(specifier, { paths });
+
+        // This will only work on Node >=10.12.0
+        var url = require('url');
+        var importSpecifier = url.pathToFileURL(resolved)
+
+        // Dynamic import, should be supported by Node if importModuleDynamically is called
+        return import(importSpecifier);
+      },
     });
 
     if (script.cachedDataProduced) {