In reply to zeokat.

I'm not surprised the page generation time would take longer with object caching running, as it needs to spend time stashing the objects. If the object cache was primed beforehand, then you would probably notice the opposite effect.

This would probably be particularly noticeable with disk caching, since caching to disk would typically take longer to store data in than a dedicated caching backend. The object cache benefits comes about when viewing pages which are not statically cached, eg: commenters, logged in users or anyone else who has triggered a cookie or needs to see unique content on the page. If you only serve static pages, then the object caching would not really help much, or may even slow things down as you noticed.