#25230: Change to Query.get_count() causes big performance hit
-------------------------------------+-------------------------------------
     Reporter:  dexity               |                    Owner:  nobody
         Type:                       |                   Status:  new
  Cleanup/optimization               |
    Component:  Database layer       |                  Version:  1.8
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
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Comment (by dexity):

 We use MySQL. {{{Model.objects.distinct().count()}}} is a simple query to
 make the problem obvious. There might be intermediate filters which
 apparently make {{{distinct()}}} more relevant.

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Ticket URL: <https://code.djangoproject.com/ticket/25230#comment:8>
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