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
35241	Cache Model._meta.get_parent_list()	Adam Johnson	Adam Johnson	"Another candidate for caching, like #35230 and #35232, following the same system check profiling.

`Model._meta.get_parent_list()` computes the flattened list of ancestor models by MRO. This list is immutable, deterministic, and recursively constructed through the inheritance hierarchy. These properties make it a prime candidate for caching.

I found this method was taking ~1% (0.39ms) of the total runtime for system checks on a project with 118 models. After adding caching, it’s reduced to a negligible amount (<0.01ms).

`get_parent_list()` is called in many other code paths, so caching will help all of those too."	Cleanup/optimization	closed	Database layer (models, ORM)	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0