When I tried to decide between a Middleman app with minimal configuration work and easy deploy (Heroku), or Ghost, Wordpress, or something like that, one consideration was page generation time.

I calculated that most optimistically, I'd probably write at most three articles a week (which is very optimistic). That means approximately 150 articles a year. That's pretty quick to generate, so I could even leave the generation process to heroku on first page refresh if I wanted.