Let's say I have a shared folder on my machine, for example : \MyMachine\foo.
If I try to access it on the "MyMachine" computer, will it be smart enough to know that it is on the same machine and won't try to use the network adapter and be super slow? I tested it by disabling my network adapter and it was still working, but it might have been because I disabled it that it checked locally instead of using the network adapter. 

My concern for not wanting to use the network adapter is speed. Large amount of data needs to be acceded sometime by network path if used outside, but if it is getting acceded locally it has to be quickly.