elpaso/django-dag — pull request #6 by hyperair (2012-11-29 10:06:59+00:00)
Title: Allow circular check to be disabled

The circular check is a pretty expensive operation in the case of large graphs,
so allow it to be disabled via a keyword argument when adding DAG edges. This is
useful for cases when the user is absolutely sure that there are no cycles in
the graph, e.g. when importing a properly sanitized graph.