A webpage referenced by the Wikipedia article on Btrfs claims that (emphasis mine)
[Btrfs] reflinks have the same use as hardlinks, but are more space efficient.
I thought that the opposite was true—that hardlinks are more space-efficient because a hardlink creates only a directory entry that points to the existing inode, whereas a reflink creates a directory entry, an inode, and file metadata.
Furthermore, a reflink duplicates file data if the data is inlined within the metadata, whereas this never happens with a hardlink because there is no new metadata for the file.
Am I correct?
