The Vulkan Graphics API, if supported by the game and your device, can massively improve performance without sacrificing graphics fidelity. Many older devices do not have the updated graphics drivers to support the API, however. Luckily, XDA Senior Member BlackSoulxxx has posted a flashable zip for updated graphics drivers for Sony devices with the Snapdragon 810 or 820. Flashing these will update the Adreno 430/530 GPU to OpenGL ES 3.2 and enable Vulkan API support.
from xda-developers http://ift.tt/2kIuZSF