I use Ipcserverchannel class and Ipcclientchannel to do IPC. I try to
read a file to memory using process A and then use IPC to transport
it
to process B. However, IPC use nearly as much time as from a from
disk, which is very surprising ( I expect it to be much much faster).
What could possibly be  the problem?

Part of my code:

Server:
       IpcServerChannel serverChannel = new
IpcServerChannel("remote");
       ChannelServices.RegisterChannel(serverChannel);

       // Expose an object

RemotingConfiguration.RegisterWellKnownServiceType(typeof(SharedCache),
"myObj", WellKnownObjectMode.Singleton);

Client:
           clientChannel = new IpcClientChannel();
           ChannelServices.RegisterChannel(clientChannel);

RemotingConfiguration.RegisterWellKnownClientType(typeof(SharedObj),
"ipc://remote/myObj");

ShareObj is the shared remoting object which can reading the file
from
the disk and transport the file to the client process.