A few months ago I tried using hubzilla to pull in a few feeds from blogs. I figured blogs would be less intensive than, say, news sites, which create hundreds or thousands of stories. But I abandoned the attempt because it slowly pulled in entire blogs, going back 10 years or more, rather than limiting to recent stories. Also they would unpredictably arrive in bunches. I think there are better tools to collect feeds. But maybe I was doing something wrong.