editor: do not reread all data upon branching Branch creation is a special case of add_directory(). Until now, it was handled by enumerating branch parent files and creating svncopy records which were later converted into open files or pushed into the RevisionData. By default, there is no reason to record anything, the files are the same than in the parent changeset. The tricky part is to correctly check the source is the parent revision. This change massively speeds up regular branching operations.