#33749: Queries take exponential time when filtering in a loop
-------------------------------------+-------------------------------------
     Reporter:  Enhaloed             |                    Owner:  nobody
         Type:  Bug                  |                   Status:  closed
    Component:  Database layer       |                  Version:  3.2
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:  invalid
     Keywords:                       |             Triage Stage:
                                     |  Unreviewed
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------
Changes (by Carlton Gibson):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 Hi. There's not enough to demonstrate an issue in Django here.

 TBH it looks more like a usage issue. (If `cards` is a QuerySet that never
 gets reset you're asking it do ever more work in the loop. Either way, you
 need to be using explain to see the work your DB is actually performing.)
 Please see TicketClosingReasons/UseSupportChannels for appropriate places
 to get help.

 If you can identify a concrete issue with a reproduce in Django, then here
 is the appropriate place for that.

 Good luck.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/33749#comment:3>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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