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Nivas0522,

In my mind, having ten copies of the same document is always absolutely bad regardless of its size, because it slows down backups, file searches and other operations. But if I need to keep a file, I need it regardless of its size.

In other words, in my mind duplicates are a problem to solve by itself, regardless of size and recovering disk space. That's another issue that comes after, and that's why I have never considered adding a sorting function like the one you suggest.
Besides, the reason I ignore empty files is that I only run these scripts on the folders that contain the documents that I create or recover from backups, not in the folders like /tmp that are used by the system to work.