Best node performance for an expressjs app

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1

The log I’m getting from this example app shows a minimum response time of 4 - 17 ms. The route itself is doing nothing. Is this the quickest response node can do on the bbb? The board is only running the example server.

GET / 200 16.876 ms - 0
GET / 200 4.474 ms - 0
GET / 200 4.592 ms - 0
GET / 200 4.375 ms - 0
GET / 200 4.858 ms - 0
GET / 200 4.613 ms - 0
GET / 200 4.588 ms - 0
GET / 200 4.397 ms - 0
GET / 200 4.667 ms - 0
GET / 200 4.406 ms - 0

Current experiment code

`
var express = require(‘express’);
var app = express();

app.configure(function() {
app.use(express.logger(‘dev’));
});

app.get(’/’, function (req, res) {
res.send(’’)
})

var server = app.listen(3000, ‘0.0.0.0’, function () {

var host = server.address().address
var port = server.address().port

console.log(‘Example app listening at http://%s:%s’, host, port)

})

`

2

Haven’t run your code on mine (and what I’m going to say is all theoretical) but you’d need to ensure your tcp stack is optimised to minimise latency even when using a loopback interface. You still have the overhead of TCP (congestion control, flow control, stream management, IP packet ordering, retransmission, etc).
I wouldn’t have expected the beaglebone to be significantly worse/better in this respect.

This article is quite nice http://techblog.netflix.com/2014/11/nodejs-in-flames.html and so perhaps we could use some of that to profile what’s going on within Node.js itself.