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| author | David Kalnischkies <david@kalnischkies.de> | 2015-07-13 16:28:21 +0200 |
|---|---|---|
| committer | David Kalnischkies <david@kalnischkies.de> | 2015-08-10 17:27:18 +0200 |
| commit | 71c9e95b223517b5f51c4627f6ad4cce8af0d901 (patch) | |
| tree | b10de544871f4d7c2d58cd202d310072f85444be /cmdline/apt-cache.cc | |
| parent | fd23676e809b7fa87ae138cc22d2c683d212950e (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
Diffstat (limited to 'cmdline/apt-cache.cc')
| -rw-r--r-- | cmdline/apt-cache.cc | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/cmdline/apt-cache.cc b/cmdline/apt-cache.cc index 9c884433c..cfa789fd9 100644 --- a/cmdline/apt-cache.cc +++ b/cmdline/apt-cache.cc @@ -364,14 +364,14 @@ static bool Stats(CommandLine &) cout << _(" Single virtual packages: ") << DVirt << endl; cout << _(" Mixed virtual packages: ") << NVirt << endl; cout << _(" Missing: ") << Missing << endl; - + cout << _("Total distinct versions: ") << Cache->Head().VersionCount << " (" << SizeToStr(Cache->Head().VersionCount*Cache->Head().VersionSz) << ')' << endl; cout << _("Total distinct descriptions: ") << Cache->Head().DescriptionCount << " (" << SizeToStr(Cache->Head().DescriptionCount*Cache->Head().DescriptionSz) << ')' << endl; - cout << _("Total dependencies: ") << Cache->Head().DependsCount << " (" << - SizeToStr(Cache->Head().DependsCount*Cache->Head().DependencySz) << ')' << endl; - + cout << _("Total dependencies: ") << Cache->Head().DependsCount << "/" << Cache->Head().DependsDataCount << " (" << + SizeToStr((Cache->Head().DependsCount*Cache->Head().DependencySz) + + (Cache->Head().DependsDataCount*Cache->Head().DependencyDataSz)) << ')' << endl; cout << _("Total ver/file relations: ") << Cache->Head().VerFileCount << " (" << SizeToStr(Cache->Head().VerFileCount*Cache->Head().VerFileSz) << ')' << endl; cout << _("Total Desc/File relations: ") << Cache->Head().DescFileCount << " (" << @@ -450,6 +450,7 @@ static bool Stats(CommandLine &) APT_CACHESIZE(VersionCount, VersionSz) + APT_CACHESIZE(DescriptionCount, DescriptionSz) + APT_CACHESIZE(DependsCount, DependencySz) + + APT_CACHESIZE(DependsDataCount, DependencyDataSz) + APT_CACHESIZE(ReleaseFileCount, ReleaseFileSz) + APT_CACHESIZE(PackageFileCount, PackageFileSz) + APT_CACHESIZE(VerFileCount, VerFileSz) + |