Compare our bulk_create() with the Django effort #11
Description
A suggestion to introduce bulk_create() for MTI into Django exists in django/django#13763. The PR suggests several issues we should consider:
- There may be a problem with our implementation when there's more than one level of inheritance
- There may be a way to insert the data into several tables in one database roundtrip
- There are tests in the Django test-suite which we may "import"