Intel Broadwell Laptop OpenGL Performance: Windows 10 vs. Ubuntu Linux

With having a new Intel Broadwell laptop for testing that came pre-loaded with Microsoft Windows 10 x64, I couldn't resist the opportunity to run some comparison benchmarks against Ubuntu Linux. The Intel HD Graphics 5500 were tested under Windows 10 and then under Ubuntu 15.10 -- both in a stock configuration and then switching over to the Linux 4.4 kernel with Mesa 11.2 Git.