The reality is far more complex, and far more powerful. The —that background process you see in Task Manager ( VulkanRT or vulkaninfo.exe )—is not the driver. It is a user-mode intermediary that fundamentally changes the contract between your application and the silicon.
The reason AAA games see a 2-3x performance uplift over OpenGL isn't because the runtime is faster—it's because the runtime . The overhead isn't removed; it's exposed , giving you the responsibility and the power to eliminate it.
Why? Because the runtime has to translate your SPIR-V (intermediate bytecode) into the GPU's native ISA—a process that involves register allocation, warp scheduling, and memory layout. The driver used to do this transparently. Now, own the cache serialization. 4. The Memory Footprint: Why VulkanRT sits at 50-100MB Look at Task Manager. Why does the runtime use so much RAM? vulkan run time
Beyond the Driver: Deconstructing the Vulkan Runtime and Why It’s More Than Just a “Driver Replacement”
And without a , the runtime will recompile your PSO (Pipeline State Object) every single time you run your app. That’s seconds of stutter. The reality is far more complex, and far more powerful
We often call Vulkan a "low-level graphics API." But that phrase is dangerously reductive. It leads most developers to think of it simply as a thinner wrapper around the GPU command processor.