#34713: Sitemap index performance regression
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Reporter: Christoph Krybus | Owner: nobody
Type: Uncategorized | Status: new
Component: contrib.sitemaps | Version: 4.1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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In django 4.1+ <lastmod> was added to sitemap index
(https://code.djangoproject.com/ticket/25916)
One consequence of this is that django loads now the whole queryset into
memory in order to determine the lastmod value for each sitemap entry in
the sitemap index. In django versions < 4.1 this was not the case, the
paginator just needed to know the number of elements to generate links to
the sitemaps.
My sitemap has ~1.5M entries, it worked OK in django 4.0, in django 4.1
the VM comes to a standstill.
There seem to be no way to disable this new feature without also disabling
lastmod on single entries. As a workaround I'm overriding the whole view
right now.
For the vast majority of sites the worse performance should not be a
problem, but maybe there could be a setting or at least an overridable
parameter to disable it?
The index view
https://github.com/django/django/blob/4.2.3/django/contrib/sitemaps/views.py#L65
has already a variable called all_indexes_lastmod maybe it could be
initialized by a new index view argument? Something like
`enable_index_lastmod=True`.
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Ticket URL: <https://code.djangoproject.com/ticket/34713>
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