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Django 1.11 slow ChoiceField rendering
See original GitHub issue- Package version: 1.6.1
- Django version: 1.11
- Python version: 3.6.1
Description:
I just upgrade to Django 1.11 and I noticed that in a specific form that we render timezones from pytz.common_timezones (currently 439 items) I’m getting error 503. After some tests, it seems that rendering ChoiceFields is extremely slow. If i trim the list down to a few items (<100) the form is displayed in a reasonable time. So I replaced the code for something like forms.ChoiceField(choices=[('test', 'test')] * 100) and the response time increases almost exponentially by the number os itens in the list.
Downgrade to 1.10.7 and everything is fast as always.
Issue Analytics
- State:
- Created 6 years ago
- Comments:5
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@mdalpi Do you have the Django Debug Toolbar enabled while testing this? I had the same problem, and finally found that disabling DDT solved the problem. See
https://github.com/jazzband/django-debug-toolbar/issues/910
Wow, I was about to downgrade to 1.10 because of this. Indeed DDT is the culprit. Thanks for bringing this up @mdalpi and thanks @xbello for the solution!