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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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17
src/libstore/misc.cc
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@ -35,12 +35,13 @@ void Store::computeFSClosure(const Path & path,
if (includeDerivers && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
for (auto & i : outputs)
if (isValidPath(i) && queryDeriver(i) == path)
if (isValidPath(i) && queryPathInfo(i)->deriver == path)
edges.insert(i);
}
} else {
queryReferences(path, edges);
auto info = queryPathInfo(path);
edges = info->references;
if (includeOutputs && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
@ -48,10 +49,8 @@ void Store::computeFSClosure(const Path & path,
if (isValidPath(i)) edges.insert(i);
}
if (includeDerivers) {
Path deriver = queryDeriver(path);
if (isValidPath(deriver)) edges.insert(deriver);
}
if (includeDerivers && isValidPath(info->deriver))
edges.insert(info->deriver);
}
for (auto & i : edges)
@ -189,8 +188,10 @@ Paths Store::topoSortPaths(const PathSet & paths)
parents.insert(path);
PathSet references;
if (isValidPath(path))
queryReferences(path, references);
try {
references = queryPathInfo(path)->references;
} catch (InvalidPath &) {
}
for (auto & i : references)
/* Don't traverse into paths that don't exist. That can