Long delays when sending packets over 1KB via UDP

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C++/CLI

Windows

UDP

Hi!

I have a C++ class that sends UDP packets using Winsock2 (kind of a wrapper).
I noticed that sending packets smaller than 1KB takes 0ms delay (measured by GetTickCount()). When the size is over 1KB the timing becomes almost 3seconds!!!

Does anyone have any idea what can cause this behavior?

Some info about the connection: I make a UDP socket and bind() it to a local address (IP, port). When sending, I use sendto() to send to a specific remote (IP, port) address.

Thanks.