zstd has a long range mode, which lets it find redundancies a gigabyte away. Try --long and --long=31 for very long range mode. zstd has delta / patch mode, w

zstd has a long range mode, which lets it find redundancies a gigabyte away. Try --long and --long=31 for very long range mode. zstd has delta / patch mode, which creates a file that stores the "patch" to create a new file from an old (reference) file. See https://github.com/facebook/zstd/wiki/Zstandard-as-a-patching-engine https://github.com/facebook/zstd/wiki/Zstandard-as-a-patchin... See the man page: https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md