GL_vs_VK: A Micro-Benchmark Looking At The Overhead Of OpenGL vs. Vulkan APIs

With the terrain demo, the Vulkan version was running noticeably faster than OpenGL. The NVIDIA driver was doing the best while on the AMD drivers with this test AMDGPU-PRO was faster than RADV while with OpenGL, RadeonSI was faster than the binary OpenGL driver. Interestingly in this test, the Intel ANV Vulkan driver on Kabylake is faster than RADV too. It looks like this is a possible area for RADV to improve upon too considering the RadeonSI OpenGL performance matched the Vulkan results.

Lastly is the shadow mapping test with NVIDIA's Vulkan performance sweeping through with all of the best results as well as fastest OpenGL performance. In this third and final demo, the RADV Vulkan driver is slightly faster than the AMDGPU-PRO Vulkan driver while the RadeonSI OpenGL driver is also faster than AMDGPU-PRO's OpenGL stack.

Those wishing to explore these OpenGL vs. Vulkan test cases on their own can see this GitHub site.