6f2a3fc812
Most people using Git 1.5.x and later are using the newer style of remotes layout where all of their tracking branches are in refs/remotes and refs/heads contains only the user's own local branches. In such a situation we can avoid calling is_tracking_branch for each head we are considering because we know that all of the heads must be local branches if no fetch option or Pull: line maps a branch into that namespace. If however any remote maps a remote branch into a local tracking branch that resides in refs/heads we do exactly what we did before, which requires scanning through all fetch lines in case any patterns are matched. I also switched some regexp/regsub calls to string match as this can be a faster operation for prefix matching. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>