private static List<Packet> packets = new LinkedList<Packet>();

    public static void main(String[] args) {
        for (int i = 0; i < 10000; i++) {
            packets.add(new Packet());
        }

        long time = System.nanoTime();

        for (int i = 0; i < 100000; i++) {
            try {
                Thread.sleep(50);
            } catch (Throwable t) {
            }

            onTick();
        }

        System.out.println(time);
    }

    private static void onTick() {
        for (Packet packet : packets) {
            packet.getO();
            packet.getX();
            packet.getY();
            packet.getZ();
        }
    }