I have an application running in Windows XP. The application collects data from DSP acquisition and draws curves on the screen accordingly. When I ran the application on Windows 7, it is 10 times slower. Turning off TcpAckFrequency, TCPNoDelay and TcpDelAckTicks makes no difference. Windows 7 TCP/IP portal always sends ACK 200ms after receiving data pack.
Setting TcpAckFrequency or TCPNoDelay to a different value does not make any difference (after reboot).