Our CDN at Netlify (https://www.netlify.com) is based on traffic server and it's powerful plugin engine.
I've used both Squid, varnish and nginx plenty, but traffic server beat them in our benchmarks and the built in ssl termination + plugin api makes it extremely powerful...
I've used both Squid, varnish and nginx plenty, but traffic server beat them in our benchmarks and the built in ssl termination + plugin api makes it extremely powerful...