#15667: Implement template-based widget rendering
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Reporter: brutasse | Owner: brutasse
Type: New feature | Status: new
Milestone: 1.4 | Component: Forms
Version: | Severity: Normal
Resolution: | Keywords:
Triage Stage: Accepted | Has patch: 1
Needs documentation: 1 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
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Comment (by akaariai):
I have a feeling there is not much that can be done in this ticket to
improve the speed of MultipleChoiceField (or ChoiceField for that matter).
Current implementation of Django templates is just a bit slow. Maybe it
would be best to bring this up in django-developers for design decision?
Or mark this ticket design decision needed? As I see it, there are three
ways forward:
1. Accept the performance loss. For some users of 1.3 this can be a
decision which makes their current application unusable in 1.4.
2. Decide that the performance loss is unacceptable. In this case, this
ticket should wait for a faster implementation of Django template
rendering. Personally, I have high hopes that the GSOC project of Armin
Ronacher will achieve this.
3. Keep the default implementation of the performance-problematic widgets
in Python. One could still use template based rendering for these widgets,
but by default the python implementation would be used. This is a bit
uqly, but would allow this feature to get in without big worries of
performance problems for users upgrading to 1.4.
One small thing that could theoretically have an impact on performance is
the usage of context.update in get_context subclass methods. This is
creating a new stack entry in the context which can slow down variable
resolution. But as choices are in the upmost stack entry, this should not
have a big impact. Still, it would be IMHO cleaner if there would be just
one stack entry in the context given to the template.
--
Ticket URL: <http://code.djangoproject.com/ticket/15667#comment:26>
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