AdamHyski

<?php
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_bind($sock, '0.0.0.0', 10000);
for (;;) {
    socket_recvfrom($sock, $message, 1024, 0, $ip, $port);
    $reply = strrev($message)."\n";
    socket_sendto($sock, $reply, strlen($reply), 0, $ip, $port);
}

AdamHyski

package main

// go run fer.go  29.94s user 0.30s system 97% cpu 30.953 total
// ./fer  30.04s user 0.19s system 98% cpu 30.673 total

import ("math")

func main (){

	exp := 2