#35026: Improving perfromance of the apps registry `get_models()` method
-------------------------------------+-------------------------------------
               Reporter:  Kamil      |          Owner:  nobody
  PaduszyƄski                        |
                   Type:             |         Status:  new
  Cleanup/optimization               |
              Component:  Database   |        Version:  5.0
  layer (models, ORM)                |
               Severity:  Normal     |       Keywords:  apps, models
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
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 When studying the "applications" framework, I noticed that in
 `django.apps.apps.get_models()` you mention in the comment.

 > This method is performance-critical at least for Django's test suite.

 If fact, the method involves a standard list extenstions. Has anyone
 consider to implement this using `itertools.chain`?

 {{{
 #!python
 from itertools import chain

 # ...

 def get_models(self, include_auto_created=False, include_swapped=False):
     return chain(
         *(app_config.get_models(include_auto_created, include_swapped)
         for app_config in self.get_app_configs())
     )
 }}}

 Shouldn't using a generator result in increased performance?

-- 
Ticket URL: <https://code.djangoproject.com/ticket/35026>
Django <https://code.djangoproject.com/>
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