TechSpot published Testing DirectX 11 vs. DirectX 12 performance
A quote from the article:
Windows 10 has been out for a few months now and with it came a number of improvements that make it Microsoft's best OS yet. However, one of the operating system's biggest features has yet to be seen in action. DirectX 12 is a key ingredient dedicated to PC gamers but the long wait is coming to an end.Testing DirectX 11 vs. DirectX 12 performance @ TechSpot