If you configure your static files caching correctly, they will be served directly by Cloudflare in the fastest way possible given the user has a modern browser

If you configure your static files caching correctly, they will be served directly by Cloudflare in the fastest way possible given the user has a modern browser. You can use http://webpagetest.org/ http://webpagetest.org/ (or Chrome Dev Tools) and look for `cf-cache-status: HIT` header on the content that should be served directly by CF.