Apache TS is a caching proxy server. It's more similar to varnish than nginx (you can use nginx as a caching proxy if you want, of course). I never use it, but

Apache TS is a caching proxy server. It's more similar to varnish than nginx (you can use nginx as a caching proxy if you want, of course). I never use it, but from what I heard, it performs & scale really well too.