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authorDavid Kalnischkies <david@kalnischkies.de>2015-07-13 16:28:21 +0200
committerDavid Kalnischkies <david@kalnischkies.de>2015-08-10 17:27:18 +0200
commit71c9e95b223517b5f51c4627f6ad4cce8af0d901 (patch)
treeb10de544871f4d7c2d58cd202d310072f85444be /test/integration
parentfd23676e809b7fa87ae138cc22d2c683d212950e (diff)
split-up Dependency struct
Having dependency data separated from the link between version/package and the dependency allows use to work on sharing the depdency data a bit as it turns out that many dependencies are in fact duplicates. How many are duplicates various heavily with the sources configured, but for a single Debian release the ballpark is 2 duplicates for each dependency already (e.g. libc6 counts 18410 dependencies, but only 45 unique). Add more releases and the duplicates count only rises to get ~6 for 3 releases. For each architecture a user has configured which given the shear number of dependencies amounts to MBs of duplication. We can cut down on this number, but pay a heavy price for it: In my many releases(3) + architectures(3) test we have a 10% (~ 0.5 sec) increase in cache creationtime, but also 10% less cachesize (~ 10 MB). Further work is needed to rip the whole benefits from this through, so this is just the start. Git-Dch: Ignore
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