Thank you for your offer. I would be glad if you could help me.
So far I have tried to add line to the tcpip.py as suggested by the post (sent link)
self._set_tcpip_nodelay(constants.VI_ATTR_TCPIP_NODELAY, True)
I added the line of code to the end of _connect(self) -> StatusCode definition, because it didn't do anything I added the line after line 840, as also suggested by the post. In both cases the transfer is slow.