diff options
Diffstat (limited to 'src/libstore/gc.cc')
| -rw-r--r-- | src/libstore/gc.cc | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc index 03d44ebf8..ed792a777 100644 --- a/src/libstore/gc.cc +++ b/src/libstore/gc.cc @@ -617,6 +617,8 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) } }; + std::map<StorePath, StorePathSet> referrersCache; + /* Helper function that visits all paths reachable from `start` via the referrers edges and optionally derivers and derivation output edges. If none of those paths are roots, then all @@ -689,9 +691,14 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) if (isValidPath(*path)) { /* Visit the referrers of this path. */ - StorePathSet referrers; - queryReferrers(*path, referrers); - for (auto & p : referrers) + auto i = referrersCache.find(*path); + if (i == referrersCache.end()) { + StorePathSet referrers; + queryReferrers(*path, referrers); + referrersCache.emplace(*path, std::move(referrers)); + i = referrersCache.find(*path); + } + for (auto & p : i->second) enqueue(p); /* If keep-derivations is set and this is a @@ -718,6 +725,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results) if (shouldDelete) { invalidatePathChecked(path); deleteFromStore(path.to_string()); + referrersCache.erase(path); } } }; |