I always mention this whenever 'simple' web servers get mentioned. If you want something small, fast, with lots of features. You could install nginx or lighttpd. But there is another alternative, and it's called Gatling. It's available to install using any good package manager, or you can easily build from source.
I'm not telling anybody to go ahead and use it, I'm just giving another great alternative for people to look into. I've been using Gatling for a couple of years now with nothing negative to say about it. It does what it needs to do for my purpose! :)