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Subject: Re: [libssh2] sftp performance

Re: [libssh2] sftp performance

From: Peter O'Gorman <libssh2-devel_at_mlists.thewrittenword.com>
Date: Tue, 1 May 2007 00:25:07 -0500

On Mon, Apr 30, 2007 at 03:38:56PM -0400, James Housley wrote:
>
> On Apr 30, 2007, at 3:31 PM, Peter O'Gorman wrote:
>
> > On Mon, Apr 30, 2007 at 02:58:16PM -0400, James Housley wrote:
> >> On Apr 30, 2007, at 10:39 AM, Peter O'Gorman wrote:
> >>
> >>> Hi,
> >>> In a quick test I noticed that using libssh2 to sftp a file takes
> >>> more
> >>> than 20 times longer than using libssh2 to scp the same file from
> >>> the
> >>> same server. I haven't done any profiling (well, I tried but the
> >>> profiling tools on my mac os x laptop consistently crashed! I should
> >>> check that things are properly installed) but wonder if anyone has a
> >>> clue why this would be the case.
> >>
> >> What version of the library are you working with? There is also many
> >> changing being done in the version that is in CVS related to blocking
> >> calls. But this doesn't mean there aren't slowdowns written into the
> >> code.
> >
> > libssh2-0.15-20070426 snapshot.
>
> I know there are changes in that code related to the non-blocking
> work in the sftp path. Just out of curiosity, have you compared the
> older 0.14 version? Are we better or worse then that?

I am afraid that I have never tried libssh2-0.14, sorry. I'll look if
I get the chance.

Peter

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Received on 2007-05-01

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