sftp tests are slow

[Robert Collins]

On Tue, 2006-01-10 at 14:23 -0600, John Arbash Meinel wrote:
> Robey Pointer wrote:
> > I changed the subject because a bunch of different threads had the  same
> > meaningless subject line. :)
...
> >>> Yes, this is slow. We chatted on IRC about this - its about 10 times
> >>> slower than starting openssh... I find it hard to believe that  this is
> >>> intrinsic to python - I have to regard it as a bug in the stub  server.
> > 
> > 
> > 10 times is hard to believe -- what did you use to test that?
> 
> Tested the time to run:
>  sftp = bzrlib.transport.get_transport('sftp://localhost/')
>  sftp.get('a').read()
> both with _ssh_vendor = 'none' and _ssh_vendor = 'openssh'
> 
> Versus "time ssh localhost cat a"
> $ time ssh localhost cat a
> real    0m0.142s

I also tested running up sshd as part of this - invoke-rc.d ssh stop;
invoke-rc.d ssh start; ssh localhost cat a

added a little but of time, but not much

Using the server stuff in test-providers,
bzrlib.transport.get_transport(SFTPAbsoluteServer().setUp()) is
interesting...

I suspect that the issues lie in the server startup, and to a smaller
degree in the handshaking each time.

Rob


-- 
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