express-use-perf.js

var express = require('express');
var app = express();
var router = express.Router();

var M = 1000; // Size of path array
var N = 1000; // Size of middleware array

function fnNext(req, res, next) {
  next();
}

function fnDone(req, res, next) {
  res.send('ok');
}

// Set-up middleware array
var fnArr = [];
for (var i = 0; i < N; i++) {
  fnArr.push(fnNext);
}

// Set-up path array
var path = [];
for (var i = 0; i < M; i++) {
  path.push('/foo'+i);
}



// Benchmark
console.time('use-large');

// Slow!!
app.use(path, [fnArr, fnDone]);

// or alternatively...
// router.use(path, [fnArr, fnDone]);

console.timeEnd('use-large');
process.exit(0);