Prioritiser

Idle (basically the same as low)
Low-priority threads receive CPU time only when the system is free. Usually, these tasks do not affect system performance and are executed when other tasks are idle.

Below Normal
Threads with this priority receive less CPU time than threads with normal priority. They run in the background, minimizing the impact on the performance of other tasks.

Normal
It is the default priority for most user and system processes. Threads with normal priority receive equal CPU time. The system allocates CPU time between such threads in the normal mode, ensuring stable performance.

Above Normal
Threads with this priority receive more CPU time compared to normal-priority threads, but less than high-priority threads. Good balance between performance and system impact.

High
High priority threads receive more CPU time than normal priority threads. They can crowd out lower-priority threads, allowing for fast data processing, but not so intensely that they block system operation.

Realtime
Threads with this priority get the maximum amount of CPU time and can crowd out all other tasks. The system provides CPU time to such tasks almost without delay, which may cause other processes to be ignored, which in turn may cause the system to hang.