Investigate and implement a caching strategy

[erictheise]

As I write this the database associated with the site has 57 database tables and performance, as one-to-many relationships have expanded to be many-to-many relationships, is waning. Data itself is not expected to change frequently and so the site would benefit from a good caching strategy.

Embarrassed to admit that I do not know if Varnish is still the preferred solution or has been replaced by other solutions but what it does is what will be needed.

Identify a viable caching library.
Implement it.
Tune it.