This is true although if you're not doing domain sharding and just have your static assets on a single domain, I don't think this is a concern. Certainly the pe

This is true although if you're not doing domain sharding and just have your static assets on a single domain, I don't think this is a concern. Certainly the performance benefit of having your assets served by a CDN on a different domain will outweigh the cost of the extra connection. (Assuming your CDN supports HTTP2.)