How can I find the response time (latency) of a client in NodeJS with sockets (socket.io)?

Question

I\'m trying to create a multiplayer game with NodeJS and I want to synchronize the action between clients.

What would be the best way to find the latency (the time that

Answer 1

After reading all these answers...

...I still wasn't satisfied. I visited the official docs and well, well, well - the solution is already built-in.

You just need to implement it - check out mine:

Client

// (Connect to socket).

var latency = 0;

socket.on('pong', function(ms) {
    latency = ms;

    console.log(latency);
});

// Do cool things, knowing the latency...

 Server

var server = require('http').Server(app);

// "socket.io": "^1.7.1"
// Set pingInterval to whatever you want - 'pong' gets emitted for you!
var io = require('socket.io')(server, {pingInterval: 5000});