nodejs
diff --git a/Collapse file
‎benchmark/esm/detect-esm-syntax.js‎
Copy file name to clipboardExpand all lines: benchmark/esm/detect-esm-syntax.js
+16-17Lines changed: 16 additions & 17 deletions b/Collapse file
‎benchmark/esm/detect-esm-syntax.js‎
Copy file name to clipboardExpand all lines: benchmark/esm/detect-esm-syntax.js
+16-17Lines changed: 16 additions & 17 deletions
@@ -4,34 +4,33 @@
 // We use the TypeScript fixture because it's a very large CommonJS file with no ESM syntax: the worst case.
 const common = require('../common.js');
 const tmpdir = require('../../test/common/tmpdir.js');
-const fixtures = require('../../test/common/fixtures.js');
-const scriptPath = fixtures.path('snapshot', 'typescript.js');
 const fs = require('node:fs');
 
 const bench = common.createBenchmark(main, {
-  type: ['with-module-syntax-detection', 'without-module-syntax-detection'],
+  type: ['with-package-json', 'without-package-json'],
   n: [1e4],
-}, {
-  flags: ['--experimental-detect-module'],
 });
 
-const benchmarkDirectory = tmpdir.fileURL('benchmark-detect-esm-syntax');
-const ambiguousURL = new URL('./typescript.js', benchmarkDirectory);
-const explicitURL = new URL('./typescript.cjs', benchmarkDirectory);
-
 async function main({ n, type }) {
   tmpdir.refresh();
+  fs.mkdirSync(tmpdir.resolve('bench'));
 
-  fs.mkdirSync(benchmarkDirectory, { recursive: true });
-  fs.cpSync(scriptPath, ambiguousURL);
-  fs.cpSync(scriptPath, explicitURL);
-
-  bench.start();
-
+  let loader = '';
+  const modules = [];
   for (let i = 0; i < n; i++) {
-    const url = type === 'with-module-syntax-detection' ? ambiguousURL : explicitURL;
-    await import(url);
+    const url = tmpdir.fileURL('bench', `mod${i}.js`);
+    fs.writeFileSync(url, `const foo${i} = ${i};\nexport { foo${i} };\n`);
+    loader += `import { foo${i} } from './mod${i}.js';\n`;
+    modules.push(url);
   }
+  const loaderURL = tmpdir.fileURL('bench', 'load.js');
+  fs.writeFileSync(loaderURL, loader);
 
+  if (type === 'with-package-json') {
+    fs.writeFileSync(tmpdir.resolve('bench', 'package.json'), '{ "type": "module" }');
+  }
+
+  bench.start();
+  await import(loaderURL);
   bench.end(n);
 }