I was looking to move my Drupal site to Jekyll but quickly got bored. I therefore moved the site to Sinatra and now Rails, yes it's slower than jekyll and the rails site is slower than the sinatra one but more fun.
Sure, my site is just "my stuff", quotes and links I collect, maybe a rambling here and there. Therefore my comment is not quite on-topic, it's not the same kind/league of site. But I just can't find anything exciting in pure speed, I want something that I like when I look at it and use it, not something I like because I know it's very popular. I like having variable and filterable views on content, user preferences, etc. too much.
I don't want to pretend I'm some kind of artist; I'm a shoddy coder, and not a great designer either. My CMS is unusable for anyone except me I'm sure. But still I take pride and enjoyment in whatever it is I'm doing, and at the very least I would encourage everyone to make something that is about ideas and features more than performance, even if as a secondary/private site. Minimalism is sometimes overrated. It may be more effective when dealing with many people, but it's also a bit sterile. So maybe do both, one for business, the other for inspiration.