restic/vendor/src/github.com/restic/chunker/README.md

The package chunker implements content-defined-chunking (CDC) based on a rolling Rabin Hash. The library is part of the restic backup program.

An introduction to Content Defined Chunking can be found in the restic blog post Foundation - Introducing Content Defined Chunking (CDC).

You can find the API documentation at https://godoc.org/github.com/restic/chunker