Caching introduces additional constraints. What if someone updates a record in the database and the cache isn't updated at the same time? What if more than one process accesses the database at once? The odds of that may be low, but they increase as site traffic increases (and webmasters are all for that!).

That's presuming the original poster moves to a persistent CGI environment -- if each script invocation is a separate process, caching won't help at all. A good database will implement its own caching scheme, whether it's sorting results or keeping track of common queries.

Besides that, keeping the cache around might eat up a lot of memory which could be used to spawn more processes. And anyway, if performance is such a big deal, replacing the tied hash with a real relational database (supporting LIMIT) will probably give the biggest improvement, aside from Fast::CGI or mod_perl.

In reply to RE: RE: Re: Next 10.... by chromatic
in thread Next 10.... by Elliot_Ness

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