[gcr]

How does this differ from zpaq and dwarFS?

Zpaq is quite mature and also handles deduplication, versioning, etc.

[jauntywundrkind]

Or pax. https://linux.die.net/man/1/pax

Or eStargz. https://github.com/containerd/stargz-snapshotter

Or Nydus RAFS. https://github.com/dragonflyoss/nydus

Links for your mentioned zpaq and dwarFS https://www.mattmahoney.net/dc/zpaq.html https://github.com/mhx/dwarfs