The Performance Control Unit (PCU) plugin is designed to increase the frame rate in X-Plane 11 in a couple of click.
To a greater extent, it is designed for simmers with low-end and mid-end computers. But can be used in powerful systems.
The core feature of this plugin is that it has a few buttons to operate and under the hood it has smart logic that helps X-Plane not to bake your system up during the flight.
This plugin IS NOT designed to make your X-Plane looks better, it does not change clouds, shaders and other visual stuff (except some improvements with lights and sun).
It operates only with environmental settings that can decrease your fps and changes it to improve your FPS