update benchmarks and use throng on expressjs for better performance-- 21 Nov 2017 with linux ubuntu and latest mainline kernel 4.14

Former-commit-id: 40d27dd7d02f4ead756be090364075a6570ae2cb

_benchmarks/expressjs-throng/app.js

@@ -0,0 +1,22 @@
+process.env.NODE_ENV = 'production';
+
+const express = require('express');
+const createWorker = require('throng');
+
+
+createWorker(createWebServer)
+
+function createWebServer() {
+  const app = express();
+
+  app.get('/api/values/:id', function (req, res) {
+    res.send('value');
+  });
+
+  app.listen(5000, function () {
+    console.log(
+      'Now listening on: http://localhost:5000\nApplication started. Press CTRL+C to shut down.'
+    )
+  });
+
+}