Too slow for my purposes

I have a very specialized use for this application. I’ve got a 6 TB RAID (media server) that I back up about once a month (12 hours over TB to back up, btw). I’d like to run a little utility to compare my media server drive against the backup drive, once the backup is created. Ideally, the comparison should take the same amount of time as the backup (or less, as reading disks is faster than writing them).

So I copied a 32 GB subdirectory. This took about 2 minutes (SSDs on a Retina MacBook Pro). Running “diff -rq dir1 dir1Copy” took 2:32. Compare Folders (with $5 in-app purchase to do binary comparisons) took 4:48. IOW, I would expect Compare Folders to take over twice as long (24 hours) to compare the two drives as it took to back them up. Using diff is a bit cumbersome, but to save 12 hours, I can live with that.

The program will probably work for other use cases; certainly not the best choice for backup comparisons. Oh well, $5 was worth the attempt.

ANicknameThatProbablyIsntTaken about Compare Folders