Add benchmark

Author: jsumners

benchmark/fixtures/esm-dir-file.mjs

@@ -0,0 +1,3 @@
+import assert from 'assert';
+assert.ok(import.meta.dirname);
+assert.ok(import.meta.filename);

benchmark/fixtures/load-esm-dir-file.js

@@ -0,0 +1,5 @@
+(async function () {
+  for (let i = 0; i < 1000; i += 1) {
+    await import(`./esm-dir-file.mjs?i=${i}`);
+  }
+}());

benchmark/misc/startup.js

@@ -9,6 +9,7 @@ const bench = common.createBenchmark(main, {
   script: [
     'benchmark/fixtures/require-builtins',
     'test/fixtures/semicolon',
+    'benchmark/fixtures/load-esm-dir-file',
   ],
   mode: ['process', 'worker'],
   count: [30],