#13283: CACHE_MIDDLEWARE_ANONYMOUS_ONLY kills anonymous caching efficiency
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Reporter: carljm | Owner: nobody
Status: new | Milestone:
Component: Cache system | Version: SVN
Resolution: | Keywords: session accessed vary
cookie
Stage: Accepted | Has_patch: 1
Needs_docs: 0 | Needs_tests: 0
Needs_better_patch: 1 |
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Comment (by natrius):
My patch still caches responses that vary by cookie for anonymous users,
which is probably undesirable for users who would want to set this in the
first place. A setting that skips any response that varies by cookie is a
cleaner and more effective way to do it. (My local patch makes altering
the caching conditions in `UpdateCacheMiddleware` subclasses much easier
and provides a `SkipVaryCookieUpdateCacheMiddleware` instead of a setting,
which is a more extensible solution.)
Having `CACHE_MIDDLEWARE_ANONYMOUS_ONLY` at all will give users an
incorrect mental model of how caching in general works. Anonymity is
irrelevant. `Vary` headers are the right place for users to be looking, so
an appropriately named option that performs the correct behavior will have
positive educational side-effects in addition to the small performance
benefits.
--
Ticket URL: <http://code.djangoproject.com/ticket/13283#comment:20>
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