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
28455	"Create ""inplace"" QuerySets to speed up certain operations"	Anssi Kääriäinen	Keryn Knight	Part two of #20880: Inplace querysets work precisely like full-clone querysets. A queryset is called inplace if it doesn't do cloning at all between operations. This again allows speeding up certain internal operations like model.save() and prefetch_related(), and also allows users to optimise heavy-to-create querysets by avoiding clone() overhead.	Cleanup/optimization	assigned	Database layer (models, ORM)	dev	Normal			Simon Charette	Accepted	0	0	0	0	0	0