hg slow on large repo

[Matt Mackall]

On Wed, May 23, 2007 at 09:17:31AM -0400, Benjamin LaHaise wrote:
> Hello,
> 
> I've been investigating the various tools available for migrating a large 
> (11GB) cvs repository into.  After running cvs20hg for a rather long period 
> of time, I now have in my hands a moderately (4.1GB) sized hg repository.
> 
> Now I try to do a clone.  It takes about 15 minutes at 100% CPU utilisation, 
> which is pretty much a non-starter for usability.  The disk isn't anywhere 
> near being saturated.

Is this a local clone on the same partition? In other words, is it
using hardlinks? Or is this over the wire? For going over LAN or fast
WAN, you can use --uncompressed.

How much of the time is clone vs checkout (try time hg clone -U
followed by hg update)? 

For the update side of things, how much time does it take to untar a
comparable tar.gz?

If local, how much time does it take to do a straight cp and cp -al of .hg?

Tricks exist, but let's figure out what the problem is first.

-- 
Mathematics is the supreme nostalgia of our time.