Highlights from the main #erofs (used by #composefs) merge for #Linux 6.17[1]:
""We now support metadata compression. It can be useful for embedded use cases or archiving a large number of small files.
Additionally, readdir performance has been improved by enabling readahead (note that it was already common practice for ext3/4 non-dx and f2fs directories). We may consider further improvements later toalign with ext4's s_inode_readahead_blks behavior for slow devices too.""
[1] https://git.kernel.org/torvalds/c/76a9701325d39d8602695b19c49a9d0828c897ca