This is fdupes 2.3.0. If you're an end-user then you probably want the file named fdupes-2.3.0.tar.gz. The other archives are created automatically by GitHub and are intended for developers.

Changes from 2.2.1 to 2.3.0:

• Add --cache option to speed up file comparisons.
• Use nanosecond precision for file times, if available.
• Fix compilation issue on OpenBSD.
• Other changes like fixing typos, wording, etc.