Which is the smarter git protocol, ssh or git(over ssh) or https protocol?

Question

Which is efficient? SSH:// or Git:// (File compression)

I understand in Git, git protocol is smart because there is a protocol agent on both ends of communication t

Answer 1

(I wanted to add a comment to @erjiang answer, but I'm not allowed because I don't have enough StackOverflow reputation.)

It seems that since Git 1.6.6, HTTP is not "dumb" anymore. From Git website's blog:

As of the release of version 1.6.6 at the end of last year (2009), however, Git can now use the HTTP protocol just about as efficiently as the git or ssh versions