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RE: Slowness of svn and http

From: Yanghui Bian <ybi_at_vitesse.com>
Date: 2003-07-18 23:28:49 CEST

You are not alone. :-)
In my local computer, I have the apache server running and
it takes quite long time to checkout my code from SVN while from CVS it
takes only one fifth of the time.
There might be something to tune SVN up.


-----Original Message-----
From: plasma [mailto:plasmaball@pchome.com.tw]
Sent: Friday, July 18, 2003 9:24 AM
To: dev@subversion.tigris.org
Subject: Re: Slowness of svn and http

On Thu, Jul 17, 2003 at 10:48:21AM -0500, Ben Collins-Sussman wrote:
> plasma <plasmaball@pchome.com.tw> writes:
> > Today, I set up a svn network server, import source of mozilla 1.0,
> > then check out.
> >
> > After one hour, I was still waiting checkout to finish. Isn't that
> > too slow to be useful?
> What metric are you using to measure speed? What is the definition of
> "too slow"? The mozilla source is a *huge* dataset. How do you know
> one hour is "too slow"?
> Repeat the experiment with a cvs repository, compare the results, and
> I'll listen to you. I want science here, not fuzzy feelings. :-)

Sussman said I need to be scientific, so here comes the result.

The server is FreeBSD 4.7. The client is my IBM X23, FreeBSD 4.8.
I import mozilla 1.0's source, which is extracted from
mozilla-source-1.0.tar.bz2, into a repository, then check out the
source over LAN.

1. svn co http://$SVN_ROOT/mozilla-1.0 mozilla
172.907u 129.123s 1:54:06.76 4.4% 104+26171k 24311+933io 13pf+0w

2. svn co http://$SVN_ROOT/mozilla-1.0 mozilla
174.115u 130.746s 1:57:59.33 4.3% 104+26385k 23718+933io 5pf+0w

3. svn co svn+ssh://$SVN_ROOT/mozilla-1.0 mozilla
166.331u 109.494s 50:13.02 9.1% 104+24533k 23261+926io 0pf+0w

4. cvs -d :ext:$CVS_ROOT checkout mozilla
57.354u 48.390s 3:07.65 56.3% 204+1037k 269+430io 1pf+0w

The difference between 1 and 2 is that 2 is invoked with
"http-compression = no" at client side.

As you can see, svn+http takes almost 2 hours to finish. svn+ssh is
much better, 50 minutes. cvs+ssh just takes 3 minutes.

I think I can say "It's slow" aloud now. :)


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Received on Fri Jul 18 23:29:48 2003

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