Smart server usage

[Eugene Wee]

The smart server documentation currently linked from the home page of 
the Bazaar website lists three ways to run the smart server:

a) Install Bazaar on the server, then use the bzr+ssh scheme.

b) Install Bazaar on the server, provide an appropriate inetd.conf 
entry, then use the bzr scheme.

c) Install Bazaar on the server, run bzr serve as a user, then use the 
bzr scheme. 4155 is the IANA assigned port number.

I am also aware that bzr+http was made available earlier this year (bzr 
0.14). Is it like bzr+ssh in that it does not require any configuration 
to the server other than installing Bazaar, though it can be used with 
the dedicated server and thus have write access enabled?

What kind of performance gain can be expected from the smart server at 
this point? Like, how would using say, the bzr+ssh scheme compare with 
just using sftp, and bzr+http with http? Is there a penalty to not 
running the smart server in dedicated mode?

Thanks,
Eugene Wee