once you say magic word: caching, you'll get a banch of questions about it... how it works, where is it located and so on. Also, waf itself is actually slowing traffic, not accelerating, so don't even say it. It is because waf is checking request, means it has to read the entire thing, this takes time, so actually answer will come a bit later. There are some special options we use, but you don't even have to mention those, as you don't know it. So... forget acceleration part...