Time a middleware

app1.js

// generic reusable

app.use(timeMiddleware('session', session));

// …

function timeMiddleware (description, middleware) {
  return function (req, res, next) {
    var start = process.hrtime();
    middleware(req, res, function (err) {
      var diff = process.hrtime(req.timeStart);
      var time = diff[0] / 1000 + diff[1] / 1000000;
      console.log('middleware ' + description + ' (ms):', time);
      next(err);
    });
  };
}

app2.js

// time the whole thing
app.use(function (req, res, next) {
  req.timeStart = process.hrtime();
  next();
});

// all the app.use you want to time globally
app.use(session);

app.use(function (req, res, next) {
  var diff = process.hrtime(req.timeStart);
  var time = diff[0] / 1000 + diff[1] / 1000000;
  console.log('middlewares (ms):', time);
  next();
});