Why does Finder interact so slowly with NAS? I have a Synology NAS D213+.

When I want to connect the NAS to my Mac, Finder mounts a new volume which behaves like a normal partition. 

But it interacts so slowly - I click on a folder, and it takes a huge number of seconds till it's open. Explorer on Windows is much faster when it comes to network interaction. 

What can I do? Change the protocol? It must be AFP, so do I have to change the protocol elsewhere in the kernel?
My advice would be to use NFS. You should also try to manually mount the partition from the terminal, so you can add some options too, like

  -nolock,locallocks,rdirplus


This made my browsing much faster, even over wifi. 

Cheers