#13067: make bulk-deletion lots faster ------------------------------------------+--------------------------------- Reporter: carljm | Owner: nobody Status: new | Milestone: Component: Database layer (models, ORM) | Version: SVN Keywords: | Stage: Unreviewed Has_patch: 0 | ------------------------------------------+--------------------------------- 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. -- Ticket URL: <http://code.djangoproject.com/ticket/13067> Django <http://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To post to this group, send email to django-upda...@googlegroups.com. To unsubscribe from this group, send email to django-updates+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-updates?hl=en.
