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From: John Maddock (john_at_[hidden])
Date: 2006-03-06 05:36:13

>> Still, there you go ;-)
> Rather than a cache that does A or a cache that does B, I'd rather see
> someone do a review of various cache features in the literature (or
> at least whatever Google can find), identify the most useful ones,
> and then design one or more classes (probably template based) that
> delivered that
> useful feature set.
> For example, "Least Recently Used", "Least Frequently Used", and
> "Least Recently Added" are common replacement policies, but there are
> probably some others that are occasionally useful. I've used a scheme
> where entries are never flushed as long as there are any live
> references to them.
> Another way to approach a cache library design would be to collect a
> set of use cases, and then see what feature set would be needed to
> satisfy those use cases.
> Caching is one of the fundamental ways to achieve improved
> performance. I'm a bit surprised it hasn't been more of a topic in Boost
> discussions,
> or in computer science in general.
> That isn't a criticism of your object_cache; it is just that I think
> the topic deserves more than a single-solution approach.

Yep, I couldn't agree more: since I only needed one use case I only wrote
one, and that's really why I haven't brought it forward for review. Or to
put it another way I couldn't be bothered to go through all the possible
caching policies ;-)


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