client.js

var frames = 0, last = 0;
setInterval(function () {
    if (last) {
        var fps = frames / (Date.now() - last) * 1000;
        console.log('fps: ' + fps);
    }
    
    last = Date.now();
    frames = 0;
}, 1000);

var dnode = require('dnode');
dnode({
    emit : function (i) { frames ++ }
}).connect(7575);

gistfile1.txt

var dnode = require('dnode');
var EventEmitter = require('events').EventEmitter;

var clients = {};
var tick = function () {
    Object.keys(clients).forEach(function (id) {
        clients[id].emit(null);
    });
    process.nextTick(tick);
};

process.nextTick(function() {
    tick();
});

dnode(function (client, conn) {
    conn.on('ready', function () {
        clients[conn.id] = client;
    });
    
    conn.on('end', function () {
        delete clients[conn.id];
    });
}).listen(7575);