.bz2 is a file format, BspZip is a program.comparing between Bz2 vs BSPzip
These days, just use the repack command for the map.After reading, its still unclear what the performance benefit is if comparing between Bz2 vs BSPzip, if any compression difference.
would you consider adding some more information on that?
or have i misunderstood, and that in fact "uncompressed" maps does also includes .Bz2?
Yes, because you're either replacing the bsp with a full compile or adding new information to it that needs to be compressed. And if you're making a new version, an entirely new bsp.do you need to do this for every update of a Map?
CompilePal has a built-in repack function, presumably you left that enabled and the map was already repacked.