[Templates] Caching Output of Components

[Randal L. Schwartz]

>>>>> "Robert" == Robert James Kaes <rjk@wormbytes.ca> writes:

Robert> I'd like to say "the output of all components are cached.  If a child
Robert> component has changed, invalidate the child cache and its parent's
Robert> cache."  It would also be nice to selectively say "this component's
Robert> output must never be cached."

I've looked at this a number of times, and never gotten very far.  If I may
misquote Perrin, he's said something to the effect that the expense for
determining when to blow a cache (and how much to blow) often exceeds the cost
of just recomputing the darn thing.  And yes, it's a can of worms.

If there are things that are truly static, use a ttree-like building scheme to
do those once.  Otherwise, you're probably better off caching only at the page
level for those pages that you know won't change at all.

-- 
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