A little internal note: A few hours ago, I activated WP Super Cache, a plugin that caches the generated pages for some time – for the general audience even as pure HTML files so not even the PHP engine needs to start – thus reducing server load. Basically, you should notice no difference except that those pages that were accessed in the recent past are faster. Those who have written a comment (and got a cookie from that) won’t be served the “super cache” HTML.
The display of the recent comments in the sidebar may be not always up to date for non-commenters on cached pages, but I guess that’s not that much of a problem.
Moreover, DB Cache Reloaded has been running for the past few days, caching single database queries – which has the advantage that accessing other pages that have not been accessed recently also profit from this cache. However I noticed that the first access to admin pages and the first writing of a comment take a relatively long time – probably because DBCR then scans and flushes the numerous old cache files; seems this garbage collection isn’t that great yet…
Well, if you notice something wrong, please tell me.