antfarm

class CRC32 {
        
    static var table: [UInt32] = {
        (0...255).map { i -> UInt32 in
            (0..<8).reduce(UInt32(i), { c, _ in
                (c % 2 == 0) ? (c >> 1) : (0xEDB88320 ^ (c >> 1))
            })
        }
    }()

sahat

var socket = io.connect('http://localhost');
var startTime;

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

socket.on('pong', function() {
  latency = Date.now() - startTime;