200ms delays are a
smoking gun for a Nagling problem on Windows. In the registry, walk
through the GUIDs at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\servic
es\Tcpip\Parameters\Interfaces to find the IP address of the connection to the
embedded system. Then create two new values: TcpAckFrequency=1 (DWORD32) and TCPNoDelay=1
(DWORD32).
There may also be other issues, but check
that anyway.
Marty