id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
22209	Django internals call len(queryset) instead of queryset.count()	Chris Wilson	nobody	"The documentation says:

> Note: Don’t use len() on QuerySets if all you want to do is determine the number of records in the set. It’s much more efficient to handle a count at the database level, using SQL’s SELECT COUNT(*), and Django provides a count() method for precisely this reason. See count() below.

But Django does this itself in a few places:

{{{
$ grep -r 'len.*queryset' django/
django/forms/models.py:            return len(self.get_queryset())
django/forms/models.py:        return (len(self.queryset) +
django/contrib/admin/actions.py:    if len(queryset) == 1:
}}}"	Cleanup/optimization	closed	Database layer (models, ORM)	dev	Normal	worksforme			Accepted	0	0	0	0	0	0