You're right. We had one go at caching these generated files, but we didn't like our solution. Difficulties included deciding where to put the cached files (somewhere under htdocs  so that we can serve them in response to an http request...but some people don't want us to write files into htdocs) and deciding when to invalidate them (probably data and time, with the invalidate period in php.ini or some other config file..but exactly what would be best...).

I'm interested in your notion of hooks and what that would look like.

If you'd like to make some suggestions on the phpsoa group where other people can join in that would be good. 

If you

For what it is worth, supporting object decorators might be a good way to go for allowing custom hooks.  One library that i think does decorators well is PEAR_Translation2 (http://pear.php.net/package/Translation2), and through the use of the decorator pattern offers a few different caching layers.

Suspending this report as the extension have not had a release for almost 9 years.  Please revive this if the extension once again shows life