Testing libsatsolver on Fedora
Seth Vidal
skvidal at fedoraproject.org
Fri Jul 31 15:14:56 UTC 2009
On Fri, 31 Jul 2009, Miroslav Lichvar wrote:
> On Fri, Jul 31, 2009 at 06:42:44PM +0530, Rahul Sundaram wrote:
>> If others are doing it wrong, then there *is* a clear and direct way to
>> demonstrate performance. Yum developers can do the performance
>> benchmarking between different dep resolves (yum, apt-rpm, smart and now
>> solv) and publish it in the way that is considered fair.
>
> I don't think it is possible to make a benchmark that would be fair
> for everyone.
>
> If I'm not mistaken yum is developed to work only with Fedora
> repositories which are conflict free, while the other depsolvers try
> to handle more general repositories with conflicts. This gives yum a
> big advantage as it doesn't need to use as complex algorithms as the
> other depsolvers use. IIRC this reduces the complexity of the problem
> from exponential to polynomial.
Yum was not developed with that in mind at all. Yum repos have conflicts
all the time. The issue is not with repos having conflicts, it is with
installed pkgs (or to be installed) packages having conflicts.
-sv
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