tree 3c3d233fe188315df9d87ddc247672a92167a3f5
parent db45da12089bf131579d100ff7990cbc18d07325
author Shawn O. Pearce <sop@google.com> 1240091151 -0700
committer Shawn O. Pearce <sop@google.com> 1240091151 -0700

Speed up 'repo start' by removing some forks

Its quite common for most projects to be matching the current
manifest revision, as most developers only modify one or two projects
at any one time.  We can speed up `repo start foo` (that impacts
the entire client) by performing most of the branch creation and
switch operations in pure Python, and thus avoid 4 forks per project.

Signed-off-by: Shawn O. Pearce <sop@google.com>