UDP “Connect”-Speed in C#

Question

I profiled some boilerplate UDP code and the speed was very good for sending only some small amount data (which is my intent).

BUT the \"connect\" method is \"very slow\

Answer 1

I have come to the following conlusion:

There is no way to make UDP faster with C#. UdpClient with standard MSDN samples is the best choice.

I found a wrapper for the core API of winsock: http://www.elitepvpers.com/forum/co2-programming/159327-advanced-winsock-c.html

But when you hit "connect" (see http://msdn.microsoft.com/en-us/library/windows/desktop/ms737625(v=vs.85).aspx) the speed is rougly the same as with the managed UdpClient.

Answer 2

udpClient.Connect sets the default host name and port, so subsequently you can call Send without specifying them. What's taking the time is the name resolution - translating HOSTNAME into an IPAddress.

If you do it once in Connect, you don't have to do it every time you Send, which is faster.