I have an application that we run locally against a postgres database but our dev/test/prod servers all run Oracle.
The command list(Person.objects.all()) runs remarkably faster against my local Postgresql database. It takes at least 10x longer against an Oracle database. The thing is the query itself doesn't seem to be holding it up.
I don't really know how to track this down without going and putting random print datetimes in the django sourcecode. I'm using django 1.4, and the cx_oracle driver to communicate with oracle.