On Sun, 02 Jan 2005 15:42:16 -0800, Jamie Zawinski <jwz@xxxxxxx> wrote: > Second: everyone keeps talking about dependency resolution and how > that's bound to be slow, but as far as I can tell, there's no reason to > resolve dependencies at all when I'm just doing "list". So either > there's dependency resolution going on when there shouldn't be, or it's > not relevant at all. You raise a very valid point here. Even if there is no dependency resolving required yum parses all package headers (file lists, requirements, obsoletes, etc) and builds the dependecny resolving indexes which is not necessary at all. I did a quick test yesterday, by changing the importFromDict, which translates the loaded pickle cache into the internat data structures used by yum, function so that it only reads nevra (name and version information) and optionaly obsoletes information (in case a list obsoletes is performed). These changes speeded up things considerably. >From about 6 seconds to 4 seconds. So it might be worth implementing a listonly flag to importFromDict which is set when the user only requested a list action. This won't speed up actual upgrades or installs, but will make things that users expect to be fast (i.e. listing available packages or updates) faster. Kind regards, Gijs Hollestelle
