Re: [Pyssh-discuss] Performance Issues

[Mark W. A. <sl...@do...>]

On Fri, Oct 28, 2005 at 01:02:51AM +1000, James Mills wrote:
> Hi,
> 
> Got a performance issues here...
> 
> ~/tmp/pyssh
> $ time ./uptime 
> uptime
>  01:01:06 up 3 days, 15:01,  5 users,  load average: 0.08, 0.10, 0.09
> 
>  prologic@earth
>  Fri Oct 28 01:01:06
>  ~
>  $ 
> 
>  real    0m7.736s
>  user    0m0.040s
>  sys     0m0.020s
> 
>  See the attached "uptime" script. Based on your own test code.
> 
>  Here's the same thing with the openssh "ssh" command:
> 
>  ~/tmp/pyssh
>  $ time ssh earth "uptime"
>   01:02:16 up 3 days, 15:02,  4 users,  load average: 0.26, 0.13, 0.10
> 
>   real    0m1.393s
>   user    0m0.016s
>   sys     0m0.004s

Change ssh.login() to ssh.open(). Using login establishes an interactive
session, so you're timing until the session closes.

> Also notice that PySSH seems to open up a pty by default.
> Should it do this ? (ihmo, I think it shouldn't).

...
> Perhaps have in the constructor of Ssh
> 
> def __init__(self, username, host, port, pty=False):

Patches welcome ;) The current version is little more than a wrapper around an
ssh pipe.

mwa
-- 
Mark W. Alexander
sl...@do...

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