duplicacy check checks the snapshot for the repository
duplicacy check -files checks files for the snapshot for the repository
duplicacy check -stats checks and reports on all snapshots
The latter seems inconsistent. I can’t even use -id <snapshot-id> to limit the range of -stats to the one snapshot.
-stats implies the -all option, so that’s why you can’t use -id - it’s overriding it. In order to build up the stats, it has to evaluate what chunks are used by what repositories and for each snapshot.
I mean, you can always ignore the stats except for the repo you’re interested in, but I think Duplicacy still has to process all the repositories to get the numbers (like unique).