Re: Serious simulation performance drop

[Michael Vogt <mvo@debian.org>]

On Tue, Sep 30, 2008 at 05:48:57PM +0200, Ferenc Wagner wrote:
> Btw, I noticed that on Lenny:
> 
> $ time /usr/bin/apt-get -o 'Debug::NoLocking=true' -s -qq upgrade
> 
> real	0m4.351s
> user	0m4.328s
> sys	0m0.020s
> 
> takes much more time than it does on Etch:
> 
> $ time /usr/bin/apt-get -o 'Debug::NoLocking=true' -s -qq upgrade
> 
> real	0m0.800s
> user	0m0.776s
> sys	0m0.020s
> 
> even though the Etch machine has half the bogomips and more than twice
> the /var/lib/apt/lists than the Lenny one (which is a paravirtual Xen
> domain on a practically idle host, but this shouldn't matter).
> 
> Did anything change between versions 0.6.46.4-0.1 and 0.7.14 that
> could explain such a big difference in CPU consumption?

Thanks for brining that up. I fixed it in my development bzr tree and
merged it into the apt debian-sid branch.

Cheers,
 Michael