java - UDP networking 3 sec delay -

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so, started working on multiplayer game today , run serious problem delay in networking. when test things on 1 machine using localhost, theres no noticable delay. when tried running client on laptop , server on pc im experiencing 2-3 sec delay.

basically im doing is:

server:

is running 2 threads, 1 listens packets on port , when recieves packet input, updates gamestate accordingly. second thread takes gamestate first , every 10ms sends client.

client:

also 2 threads, 1 recieves gamestate , second sends packets keyboard input every 10ms.

im seding datagrampackets bytearray came serialized class (both have size 100 bytes)

send code:

    serverpacket testpacket = new serverpacket(player.getx(),player.gety());      bytearrayoutputstream bos = new bytearrayoutputstream();     objectoutput out = null;     try      {       out = new objectoutputstream(bos);          out.writeobject(testpacket);       byte[] bytes = bos.tobytearray();        datagrampacket packet = new datagrampacket(bytes,bytes.length,ip,port);        socket.send(packet);       //system.out.println("server:sentupdate");     }      catch (ioexception ex)      {          system.out.println(ex.getmessage());     }           {         try          {             if (out != null)              {               out.close();             }         }          catch (ioexception ex)          {             system.out.println(ex.getmessage());         }          try          {           bos.close();         }          catch (ioexception ex)          {           system.out.println(ex.getmessage());         }     }

recieve code:

        byte[] data = new byte[packetlength];         datagrampacket packet = new datagrampacket(data, data.length);          try          {                 socket.receive(packet);         }          catch (ioexception ex)          {             system.out.println(ex.getmessage());         }       bytearrayinputstream bis = new bytearrayinputstream(packet.getdata());     objectinput in = null;     try      {       in = new objectinputstream(bis);       serverpacket res = (serverpacket)in.readobject();       return res;     }      catch (ioexception ex)      {          system.out.println(ex.getmessage());     }      catch (classnotfoundexception ex)      {         system.out.println(ex.getmessage());     }                  {         try          {             bis.close();         } catch (ioexception ex)          {             system.out.println(ex.getmessage());         }          try          {             if (in != null)              {               in.close();             }         }          catch (ioexception ex)          {             system.out.println(ex.getmessage());         }     }

any ides why slow? or should know udp networking.

how achieving such high frequency 2 threads (10ms)? sure running @ such high frequency? why use different threads receiving , sending - take longer sending after receiving on same thread. of course have accommodate latency on internet games have tolerate 200ms between each peer - in client server 400ms.


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