#24397: Speed up model rendering with apps.ready = False
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Reporter: knbk | Owner: knbk
Type: Cleanup/optimization | Status: new
Component: Migrations | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 1
Easy pickings: 0 | UI/UX: 0
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Whenever a model is rendered, the cache of several values in `model._meta`
is cleared on each known model. This has a severe performance impact when
rendering large amounts of models.
When `apps.ready` is `False`, the cache of model meta options is not
cleared. This speeds up the initial rendering of the test suite
significantly. The cache can then be cleared manually when all models are
rendered, and `apps.ready` can be set back to`True`.
Results timing `django.test.runner.DiscoverRunner.setup_databases`:
{{{
apps.ready == True - 42 seconds
apps.ready == False - 16 seconds
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/24397>
Django <https://code.djangoproject.com/>
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