[Sam Bauers]

Output caching is probably totally unnecessary for 99.9% of bbPress installs.

There are a few reasons but primarily:

1. Most of the users on your site are probably logged in, and that means they can’t get cached versions.

2. bbPress is pretty light on MySQL queries.

At Automattic we have never had any need to run any caching besides MySQL query cache, and sometimes we don’t even use that. Although our hardware might be better than most, we also have more traffic than most too.