I've used locust before - had a good experience. The benefit here is that you can more easily script and simulate "real"ish looking traffic as opposed to hittin

I've used locust before - had a good experience. The benefit here is that you can more easily script and simulate "real"ish looking traffic as opposed to hitting the same 20 random URLs - hopefully that'll give you a better idea of your projected real world performance than running ab on one URL that's cached after the first hit anyway.