Lag when sending position data

Networking & Multiplayer
#1

So what am I doing is sending the position of the player every time he moves


public void update() {
		int h = player.health;
		int mh = player.maxHealth;
		float xx = player.x;
		float yy = player.y;
		player.tick();
		if ((xx != player.x || yy != player.y) && ticks) {
			client.getServerConnection().sendUdp(new PacketPos(PlayerID, player.x, player.y));
		}
		if (h != player.health || mh != player.maxHealth) {
			client.getServerConnection().sendUdp(new PacketHealth(player.health, player.maxHealth));
		}
		ticks++;
	}

and my server sends the data to other clients


	public void received(Connection con, Object obj) {
	if (obj instanceof PacketPos) {
			for (Player p : ps) {
				Connection c = p.CON;
				if (c.getId() != con.getId()) {
					c.sendUdp(obj);
				}
			}
		}
	}

and then my clients receives that packet and moves the player with that id


	public void received(Connection con, Object obj) {
		if (obj instanceof PacketPos) {
			PacketPos pos = (PacketPos) obj;
			if(!hasID(pos)){
				con.sendTcp(new PacketReqReg(pos.id)); // if it cant recognize the id, it requests registration packet
			}
		}
	}
	
	public boolean hasID(PacketPos pos){
		for (PlayerOnline po : gclient.po) {
			if (po.id == pos.id) {
				po.posMove(pos.x, pos.y); // moves the player
				return true;
			}
		}
		return false;
	}

It is kinda working fine when there are 2 clients, when there are 3 it starts to drop the fps.

How do I optimize that and make the movement smooth?

I have tried to make it send the pos packet every few milisec but it looks chunky…

BTW: I use NitroNet