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Author SHA1 Message Date
Michael Eischer
68c9cb9c6a prune: Shrink keepBlobs set if possible 
As long as only a small fraction of the data in a repository is
rewritten, the keepBlobs set will be rather small after cleaning it up.
As golang maps do not shrink their memory usage, just copy the contents
over to a new map. However, only copy the map if the cleanup removed at
least half the entries.
 2022-10-22 18:45:12 +02:00
Michael Eischer
b21241ec1c restic: Add CountedBlobSet type 
This allows maintaining a usage counter for each blob.
 2022-10-22 18:45:12 +02:00