To get the best possible performance from Painter on your system, you need to run the Brush Accelerator.
The Brush Accelerator is a utility that starts by analyzing your processor (CPU) to detect how many cores are available and whether it supports extensions, such as AVX2. It also analyzes any available graphics processor (GPU) to determine its compatibility with Painter, as well as how much memory (RAM) is installed on your system.
After the hardware components are detected, the Brush Accelerator tests your brush performance, determines your optimal settings, and provides a score that indicates how Painter will perform on your system.