With a large amount of repositories post-review would take a long time because it would iterate over each one doing an svn info against them to get the UUID. This change gives you the option to include the UUID of the repository in the "Add Repository" form allowing you to limit post-review to a single GET API call. If you do not enter a UUID it will fail through to the old behavior. This change is very small but it inherently modifies the schema, adding a UUID column to the scmtools_repository. I admittedly do not know enough about Django to know how this will effect users upgrading.

I tested locally on my machine with a fresh install of reviewboard.