Csharp slow ?

Hello,

I have a simple csharp server/client for performance tests,
something like this

service {
binary getData();
}

which returns a 1MB buffer.(git snapshot from a few days ago).

A thrift call client->server takes 8ms
according to stopWatch.Elapsed. The same client->server
implemented from here(modified of course):

http://www.java2s.com/Code/CSharp/Network/SimpleTcpClient.htm
http://www.java2s.com/Code/CSharp/Network/SimpleTcpServer.htm

takes ~1ms. (Factor 8 faster, than the thrift client/server, all localhost
connections on windows)

I tried to narrow it down where the actual problem is, but without
luck so far.

• Its not the binary stream creation during unmarshall:

// pseudocode
byte[] getData() {
len=iprot.readi32()
byte[] x=new byte[len]
iprot.readAll(x,len);
return x;
}

It looks that its in the thrift c# library classes (TSocket,etc..),
but up to now I haven't found an explanation for the
differences.