Slow UDP data transfer from Target to Development computer

I use two simulink models, one running on a target computer and the other running on a development computer, to exchange UDP packets between those computers. Both models run at 1KHz. When sending data from development to target computer, everything works as expected. On the other hand when sending data (sine wave) from target to development computer, I can observe a long delay. As written in documentation, "UDP receive" block uses a FIFO to store the incoming data but what I need is a LIFO so as to keep the most recent value. Does anybody know if I made something wrong or if there is a better solution?