> Large worlds suffered from very poor performance because there were tens of thousands of files in a single folder. It was using subdirs for the chunks, two l

> Large worlds suffered from very poor performance because there were tens of thousands of files in a single folder. It was using subdirs for the chunks, two levels iirc, one was chunkX % 36, the next level chunkY % 36. So there weren't that many files per directory. The slowness came from the overhead of opening, read/write and closing so many files all the time. > Some random modder basically just put multiple chunks into one file so that each file is 2MB. Almost, it wasn't limited by file size, it was putting 32*32 chunks into one file that was similar to a simple file system. The format of the individual chunks within that file stayed almost the same. Yet it performed much better. NBT is indeed a little weird but fairly straight forward overall, I guess designing and implementing it just scratched an itch. It was a hobby project after all.