One of the programmers of Google on the thematic forum admitted that the company changed the hardware accelerator and in all new versions of Android, the interface will be rendered using the Vulkan API. This change will increase the speed and unload the processor.
Recall that in all previous versions, starting with the third, Android used the graphics engine Skia with the accelerator OpenGL. Using the Vulkan API to draw the interface will greatly enhance system performance. By the way, a new type of rendering is already available for activation in Android P, but at the moment it does not work correctly.