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
13067	make bulk-deletion lots faster	Carl Meyer	nobody	"Model._collect_sub_objects is called separately for every individual object-to-be-deleted, and so every relation is followed and queried once for every individual object. It is possible to condense those queries down to a single bulk query per related model, which should result in massive speedups for large bulk QuerySet deletions with related objects. Even single-object deletions will be significantly faster if they have a large number of related objects to be cascade-deleted that themselves have relations.

Alex Gaynor and I have been discussing implementation ideas, including how to do this without negatively impacting the fix for #6191."		closed	Database layer (models, ORM)	dev		fixed			Accepted	0	0	0	0	0	0