Literally SSH Filesystem. I guess pretty much the same as scp but fully mounted rather than individual copy commands.
I found that the encryption slowed things down with scp and big files, but that was on a system with a weak CPU. Changing the encryption type/strength improved speeds significantly. This was also over the internet - dedicated server to home, but I could max the connection over HTTP.
EDITED: 4 Jul 2016 15:18 by ANT_THOMAS