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Slight optimization

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This commit is contained in:
Eelco Dolstra 2019-04-29 22:23:54 +02:00
parent abbbad5679
commit 54e1ac6102
1 changed files with 4 additions and 1 deletions
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5
src/nix/list-tarballs.cc
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@ -98,10 +98,13 @@ struct CmdListTarballs : MixJSON, InstallablesCommand
} catch (EvalError & e) { } catch (EvalError & e) {
} }
} else { } else {
for (auto & attr : *v->attrs) std::unordered_set<Value *> vs;
for (auto & attr : *v->attrs) {
if (!vs.insert(attr.value).second) continue;
findDerivations(attr.value); findDerivations(attr.value);
} }
} }
}
}; };
for (auto & installable : installables) { for (auto & installable : installables) {