That's comparing apples to oranges. A proper comparison would be to create an individual Git repository for each article, not a giant repository containing all

That's comparing apples to oranges. A proper comparison would be to create an individual Git repository for each article, not a giant repository containing all the data in Wikipedia. That would work more like the current MediaWiki storage backend does, and would probably do delta compression of old revisions more efficiently than the current homebrew code.