I'm not arguing that, but rather that this ability to skip unchanged trees becau...

throw_away on Nov 25, 2014 | parent | context | favorite | on: Git's initial commit

I'm not arguing that, but rather that this ability to skip unchanged trees because the hash of all contents is bubbled up is specifically what Linus is referring to in the comment, not simply the comparison of hashes in the flat-directory use-case.