[lordpipe]

Author here -- the solution I discussed in that message isn't quite the same solution as the one linked. The `paper-zstd` repository is the one using dictionary compression on individual chunks. But in the `.mca.zst` solution I'm not using dictionaries at all. It's more like a glorified LinearPaper -- just take the region file, decompress the individual chunks, and recompress the entire 1024 chunk container together. It breaks random access to individual chunks, but it's great for archival or cloud storage offloading of infrequently visited parts of a MC world, which is what I'm using it for.

I don't remember the exact compression ratios for the dictionary solution in that repo, but it wasn't quite as impressive (IIRC around a 5% reduction compared to non-dictionary zstd at the same level). And the padding inherent to the region format takes away a lot of the ratio benefit right off the bat, though it may have worked better in conjunction with the PaperMC SectorFile proposal, which has less padding, or by rewriting the storage using some sort of LSM tree library that performs well at compactly storing blobs of varying size. I've dropped the dictionary idea for now, but it definitely could be useful. More research is needed.