I think UDPRect function is slow for my purpose. It stops the program for 100 miliseconds and wait if some data comes to udp (no matter number of data i receive). Can I speed it up somehow? For example check if there are data on udp (very fastly - 1-10 miliseconds) and if they are then read them (slowly - 100ms) simple script : while 1 UDPRecv($socket, 500) ; here it waits 100 ms every time doSomething() wend