Server-side, that's cheap -- it doesn't actually copy any data. Client-side, it's also cheap: you `svn switch` to the new branch, which is identical to your ol

Server-side, that's cheap -- it doesn't actually copy any data. Client-side, it's also cheap: you `svn switch` to the new branch, which is identical to your old branch, so only minimal housekeeping on disk (just like git).