#23817: QuerySet evaluation docs are out of date
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Reporter: koniiiik | Owner: nobody
Type: Uncategorized | Status: new
Component: Documentation | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 1 | UI/UX: 0
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The [[https://docs.djangoproject.com/en/dev/ref/models/querysets/#when-
querysets-are-evaluated|docs for QuerySet]] contain a reference to partial
evaluation of queryset and a warning that explicitly calling `list(qs)`
requires more memory than just iterating over a queryset.
As far as I can see, anytime a QuerySet is evaluated, all results are
pulled from the database at once, stored in `_result_cache` and most list-
like operations are simply proxied to this cache. This means that there is
no partial evaluation going on anymore, and `list(qs)` simply creates a
shallow copy of `qs._result_cache`.
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Ticket URL: <https://code.djangoproject.com/ticket/23817>
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