Very fast load with white gap in render time / time to complete

[robzilla]

While the Dulles machine is probably the most powerful of the bunch, the browser you're testing may run in a virtualized environment with limited resources. You're maxing out the CPU there, too: http://www.webpagetest.org/result/140317...ls/cached/

If you want to learn more about diagnosing rendering performance in with the Chrome DevTools, here are a few interesting reads:
http://addyosmani.com/blog/performance-o...-profiles/
http://remysharp.com/2013/06/07/insights...rformance/