benchmark: add simple module-require benchmark

benchmark/module/module-require.js

@@ -0,0 +1,80 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const common = require('../common.js');
+const tmpdir = require('../../test/common/tmpdir');
+const benchmarkDirectory = path.join(tmpdir.path, 'nodejs-benchmark-module');
+
+const bench = common.createBenchmark(main, {
+ type: ['.js', '.json', 'dir'],
+ n: [1e4],
+});
+
+function main({ type, n }) {
+ tmpdir.refresh();
+ createEntryPoint(n);
+
+ switch (type) {
+ case '.js':
+ measureJSFile(n);
+ break;
+ case '.json':
+ measureJSONFile(n);
+ break;
+ case 'dir':
+ measureDir(n);
+ }
+
+ tmpdir.refresh();
+}
+
+function measureJSFile(n) {
+ bench.start();
+ for (let i = 0; i < n; i++) {
+ require(`${benchmarkDirectory}/${i}`);
+ }
+ bench.end(n);
+}
+
+function measureJSONFile(n) {
+ bench.start();
+ for (let i = 0; i < n; i++) {
+ require(`${benchmarkDirectory}/json_${i}.json`);
+ }
+ bench.end(n);
+}
+
+function measureDir(n) {
+ bench.start();
+ for (let i = 0; i < n; i++) {
+ require(`${benchmarkDirectory}${i}`);
+ }
+ bench.end(n);
+}
+
+function createEntryPoint(n) {
+ fs.mkdirSync(benchmarkDirectory);
+
+ const JSFileContent = 'module.exports = [];';
+ const JSONFileContent = '[]';
+
+ for (let i = 0; i < n; i++) {
+ // JS file.
+ fs.writeFileSync(`${benchmarkDirectory}/${i}.js`, JSFileContent);
+
+ // JSON file.
+ fs.writeFileSync(`${benchmarkDirectory}/json_${i}.json`, JSONFileContent);
+
+ // Dir.
+ fs.mkdirSync(`${benchmarkDirectory}${i}`);
+ fs.writeFileSync(
+ `${benchmarkDirectory}${i}/package.json`,
+ '{"main": "index.js"}'
+ );
+ fs.writeFileSync(
+ `${benchmarkDirectory}${i}/index.js`,
+ JSFileContent
+ );
+ }
+}

lib/internal/modules/cjs/loader.js

@@ -149,7 +149,7 @@ function stat(filename) {
  if (result !== undefined) return result;
  }
  const result = internalModuleStat(filename);
- if (statCache !== null && result === 0) {
+ if (statCache !== null && result >= 0) {
  // Only set cache when `internalModuleStat(filename)` succeeds.
  statCache.set(filename, result);
  }