Comment 3 for bug 2044575

Even if there is magic object sharing, AIUI that is necessarily only server-side - i.e. when you fork the repository, launchpad knows what you forked, but if you create a new repository via 'git push' it's a blank repo and contains only the bits that you're pushing... and if you're pushing a LOT, launchpad basically has no chance to deduplicate until the push is done anyway.

And even if there's no magic object sharing, a server-side fork is still going to be a lot faster than pushing e.g. a 500MB git repo up.