#25750: During makemigrations Options._expire_cache takes 30% of the time
--------------------------------------+--------------------
Reporter: patrys | Owner: patrys
Type: Cleanup/optimization | Status: new
Component: Migrations | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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Here's the profiler output:
{{{
215373161 function calls (214826612 primitive calls) in 282.839
seconds
Ordered by: internal time
List reduced from 6484 to 10 due to restriction <10>
ncalls tottime percall cumtime percall filename:lineno(function)
5225318 59.334 0.000 89.667 0.000
django/db/models/options.py:711(_expire_cache)
40538898 27.751 0.000 27.751 0.000 {delattr}
16538241 18.624 0.000 38.450 0.000
django/apps/config.py:164(get_models)
485536 16.907 0.000 27.126 0.000
django/db/models/fields/__init__.py:358(deconstruct)
4466221 12.337 0.000 20.062 0.000
/usr/lib64/python2.7/collections.py:109(values)
79811 10.893 0.000 53.060 0.001
django/apps/registry.py:153(get_models)
73250 10.582 0.000 43.745 0.001
django/db/models/fields/related.py:317(swappable_setting)
495362 8.314 0.000 11.430 0.000
django/db/models/fields/__init__.py:137(__init__)
24359432 7.790 0.000 7.790 0.000
/usr/lib64/python2.7/collections.py:78(__iter__)
15623269/15397100 7.142 0.000 7.330 0.000 {getattr}
}}}
I have a pull request ready that makes it slightly better:
{{{
164872486 function calls (164325937 primitive calls) in 199.897
seconds
Ordered by: internal time
List reduced from 6484 to 10 due to restriction <10>
ncalls tottime percall cumtime percall filename:lineno(function)
16538241 18.580 0.000 38.545 0.000
django/apps/config.py:164(get_models)
485536 16.290 0.000 26.736 0.000
django/db/models/fields/__init__.py:358(deconstruct)
4466221 12.357 0.000 20.069 0.000
/usr/lib64/python2.7/collections.py:109(values)
79811 10.933 0.000 53.182 0.001
django/apps/registry.py:153(get_models)
73250 10.694 0.000 43.931 0.001
django/db/models/fields/related.py:317(swappable_setting)
5225318 9.295 0.000 9.406 0.000
django/db/models/options.py:711(_expire_cache)
495362 8.807 0.000 11.958 0.000
django/db/models/fields/__init__.py:137(__init__)
24359432 7.777 0.000 7.777 0.000
/usr/lib64/python2.7/collections.py:78(__iter__)
15623269/15397100 7.316 0.000 7.504 0.000 {getattr}
2 4.863 2.431 4.863 2.431 {raw_input}
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/25750>
Django <https://code.djangoproject.com/>
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