On Mon, Feb 1, 2010 at 12:16 PM, james bardin <jbar...@bu.edu> wrote: > > >>> Yes, the solution written entirely in c will be significantly faster. >>> Since this is mostly python, cpu is the limiting factor. >> >> I have zero experience in ssh and encryption, but my expection was >> that at least in the case of transfering 10+ Gb files, the process >> will be bounded by network and not CPU. >>
Your email got me thinking, so I did a few tests: The biggest boost in performance was had by using the latest pycrypto(2.1.0). You'll get a deprecation warning from paramiko that you can ignore for now (bug already submitted in github). There was a change to the HMAC code that made a huge difference in paramiko's performance. I tried using a limited bandwidth connection, and paramiko was on par with openssh when cpu wasn't a concern. When bandwidth wasn't an issue (using loopback), paramiko was about 85% of the speed of openssh on my machine. Each newer version of python2.X was slightly faster as well. _______________________________________________ paramiko mailing list paramiko@lag.net http://www.lag.net/cgi-bin/mailman/listinfo/paramiko
