ssh speed

[Rob Hagopian]

OK, I've been looking to run ssh2 without encryption to get maximum
throughput but with secure authentication. However, my tests show that the
performance speedup isn't as dramatic as I suspected:

For a 587MB file:
3des-cbc	3:03
arcfour		2:10
none		2:13

ftp		0:57

I checked, compression is off (with it on estimated times were over 5min).

I interpret the above as saying that the cipher does make a difference,
but when using a sufficiently fast cipher there's overhead in the protocol
that becomes the bottleneck. Arcfour didn't max out the CPU, nor the disk
or network I/O, so what could be slowing it down? Thoughts? Suggestions?

								-Rob