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| author | Zac Medico <zmedico@gentoo.org> | 2007-10-10 08:07:00 +0000 |
|---|---|---|
| committer | Zac Medico <zmedico@gentoo.org> | 2007-10-10 08:07:00 +0000 |
| commit | 540715f6f86b6bb6d39697222565bea7d3939291 (patch) | |
| tree | 7e7f3b08dd55abdb2c668177059bacc74a68840a | |
| parent | 6200593c44a177f93a2e677589648c4f9cf3f40e (diff) | |
| download | portage-540715f6f86b6bb6d39697222565bea7d3939291.tar.gz portage-540715f6f86b6bb6d39697222565bea7d3939291.tar.bz2 portage-540715f6f86b6bb6d39697222565bea7d3939291.zip | |
Comment about avoiding expensive metadata pulls
in depgraph.select_dep().
svn path=/main/trunk/; revision=8038
| -rw-r--r-- | pym/emerge/__init__.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pym/emerge/__init__.py b/pym/emerge/__init__.py index 7f4159ea9..123e8683c 100644 --- a/pym/emerge/__init__.py +++ b/pym/emerge/__init__.py @@ -2065,6 +2065,12 @@ class depgraph(object): old_use, iuses, now_use, cur_iuse): break + # Metadata accessed above is cached internally by + # each db in order to optimize visibility checks. + # Now that all possible checks visibility checks + # are complete, it's time to pull the rest of the + # metadata (including *DEPEND). This part is more + # expensive, so avoid it whenever possible. metadata.update(izip(self._mydbapi_keys, db.aux_get(cpv, self._mydbapi_keys))) if not built: |