Re: Git benchmarks at OpenOffice.org wiki

From: Julian Phillips <julian@quantumfyre.co.uk>
Date: May 2, 2007, 14:28 UTC
Message-ID: <Pine.LNX.4.64.0705021523290.24218@reaper.quantumfyre.co.uk>
In-Reply-To: <200705021158.04481.andyparkins@gmail.com>

On Wed, 2 May 2007, Andy Parkins wrote:

> On Wednesday 2007 May 02, Julian Phillips wrote:
>
>> A fully packed clone of the OOo git repo was indeed 1.3G, and the entrire
>> checkout + repo was indeed 8.5G (using git 1.5.1.2).

oops, meant 2.7G not 8.5G there ... sorry, was working from memory.

jp3@electron: ooo(unxsplash)>du -sh .git 1.3G .git jp3@electron: ooo(unxsplash)>du -sh . 2.7G . jp3@electron: ooo(unxsplash)>ls .git/objects/ info pack

Show 12 quoted lines

> I'm more confused now then.  I assumed the figures were accurate, but they
> cannot be:
>
>                               CVS      git      SVN
> Size of data on the server     8.5G     1.3G     n/a
> Size of checkout               1.4G     2.8G     1.5G
>
> I don't doubt the 1.3G on the server - and assume that is fully packed.  The
> checkout sizes are suspicious though.  Is that 2.8G packed?
> - If it is, then we can deduce that this is a repo+source size, since the
>   server is packed size+0 therefore the size of the source tree is
>    2.8G - 1.3G = 1.5G

the difference between 2.7G and 2.8G may be due to filesystem difference?

Show 6 quoted lines

>   In which case the other figures are wrong:
>    - CVS checkout is 1.4G - impossible, the source tree is 1.5G. And where is
>      the overhead of the CVS directories which would make it more than 1.5G?
>    - SVN checkout overhead is always _at least_ the size of the source tree
>      because it keeps a pristine copy of HEAD.  If the source tree is 1.5G,
>      then this figure should be at least 3G.

I was wondering about the subversion figures too ...

> - If it is not, then we're back to "I don't believe that git was packed"
>
> Something smells fishy here - either the source tree size is included in some,
> but not in others or the git repository wasn't packed.

1.3G is the packed size ...

jp3@electron: ooo(unxsplash)>ls -sh .git/objects/pack/
total 1.3G
  37M pack-87efcac9bcb117328e8a1b0c1b42c88c3603c5b7.idx
1.2G pack-87efcac9bcb117328e8a1b0c1b42c88c3603c5b7.pack

-- 
Julian

  ---
To err is humor.