support for fast algorithm such as snappy/s2

[bpinsard]

Thanks for that very useful piece of software!

Do you think it would be possible to support format that are optimized for fast-decompression and random seeking with indexes such as S2 https://github.com/klauspost/compress that is derived from snappy and used in minio. Being able to mount and seek these archives and decompress single-files on the fly would be amazing.