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Move path info caching from BinaryCacheStore to Store

Browse source 
Caching path info is generally useful. For instance, it speeds up "nix
path-info -rS /run/current-system" (i.e. showing the closure sizes of
all paths in the closure of the current system) from 5.6s to 0.15s.

This also eliminates some APIs like Store::queryDeriver() and
Store::queryReferences().
This commit is contained in:
Eelco Dolstra 2016-04-19 18:50:15 +02:00
parent 608b0265e1
commit e0204f8d46
21 changed files with 318 additions and 353 deletions
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4
src/libstore/gc.cc
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@ -407,7 +407,7 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
queryReferrers(path, referrers);
for (auto & i : referrers)
if (i != path) deletePathRecursive(state, i);
size = queryPathInfo(path).narSize;
size = queryPathInfo(path)->narSize;
invalidatePathChecked(path);
}
@ -485,7 +485,7 @@ bool LocalStore::canReachRoot(GCState & state, PathSet & visited, const Path & p
if (state.gcKeepDerivations && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
for (auto & i : outputs)
if (isValidPath(i) && queryDeriver(i) == path)
if (isValidPath(i) && queryPathInfo(i)->deriver == path)
incoming.insert(i);
}