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
18556	Improve query efficiency of .add() on a reverse foreign key	Alex Gaynor	Tim Graham	It does one query per object received, instead of just one for the entire batch.  Attached is a patch which fixes this.  It's technically not backwards compatible because signals are no longer sent, however one could artificially send them.  Also, in the event of an error, none of the objects will be modified, whereas currently some of them will be.	Cleanup/optimization	closed	Database layer (models, ORM)	dev	Normal	fixed			Accepted	1	0	0	0	0	0