SocketIO Client and Server Performance

ReadMe.md

SocketIO Performance Tests for Server and Client

Logs milliseconds for each leg of a websocket event.

client.js

const io = require("socket.io-client");
const socket = io.connect('http://127.0.0.1:3000', { transports: ['websocket'] });
let startTime;
const now = () => {
    const hrTime = process.hrtime();
    return hrTime[0] * 1000 + hrTime[1] / 1000000;

};
setInterval(function () {
    startTime = now();
    socket.emit('ping',now());
}, 2000);

socket.on('pong', function (time) {
    let t = now();
    console.log({
        'ping': t - startTime,
        'pong': t - time
    });
});

server.js

const express = require('express');
const app = express();
const http = require('http');
const server = http.createServer(app);
const { Server } = require("socket.io");
const io = new Server(server);
const now = () => {
    const hrTime = process.hrtime();
    return hrTime[0] * 1000 + hrTime[1] / 1000000;
};

app.get('/', (req, res) => {
    res.sendFile(__dirname + '/index.html');
});

io.sockets.on('connection', function (socket) {
    socket.on('ping', function (time) {
        console.log(time);
        socket.emit('pong', now());
        console.log({
            'ping': now() - time,
        })
    });
});

server.listen(3000, () => {
    console.log('listening on *:3000');
});