On May 7, 11:35 am, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Wed, May 7, 2008 at 11:27 AM, Nick Alexander <[EMAIL PROTECTED]> wrote:
>
> > On 7-May-08, at 11:14 AM, John H Palmieri wrote:
>
> > > In Section 7.1 of the Sage Programming Guide, it says
>
> > >> Creating clones of a repository should be fairly fast, e.g., about
> > >> 30 seconds.
>
> > > I just installed a fresh copy of Sage on my Mac and ran 'sage -clone
> > > blah', and it took almost 15 minutes to complete. Running 'sage -clone
> > > temp' a second time took just over one minute. Neither of these, and
> > > especially not the first one, is "about 30 seconds".
>
> > Cloning a repository is limited by your disk's throughput and
> > latency. Your second run is working with a primed disk cache -- this
> > says a lot about your disk's random access :)
>
> > > This is on a 2.4 GHz Mac Book Pro.
>
> > I have a similar machine and cloning is reasonably snappy. I had an
> > older Powerbook and the disk was ridiculously slow.
>
> > You might find mercurial queues lets you work with fewer clones.
>
> > Nick
>
> I think the main point of John's email is that we should update the Sage
> Programming guide with the remarks you make above.
>
> Is that right John?
Yes, that's right.
> 15 minutes for a first clone is very very very weird though. It's just
> copying a bunch of files. Maybe something else was going on with
> your computer, e.g., os x was building some spotlight index or something...
>
I'm doing this starting from a binary build, so according to didier's
post, there is some extra work that's going on. Certainly according
to the messages that sage prints out during the cloning, it's
compiling a bunch of files, not just copying things.
> William
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