Maybe fdfind instead of find - for speed: apt-get install -y fd-find
    fdfind --unrestricted --type file
    However, fdfind doesn't apear to give access to device numbers and inode numbers.  That's a show stopper.
    It does do null-termination though.

Need to use GNU versions of these programs.  They are included in about any Linux variant:
    find
    sort
    bash

Need to have zstd: apt-get install -y zstd

From my Subversion:
    count
    mtee
    eliminate-duplicates
    process-dups


Note: catenating two well-formed zst files, produces a third zst file that decompresses to the catenation of the original,
    uncompressed files.