Function low_priority_thread 

pub fn low_priority_thread()

Low Priority Thread

Sets the calling thread’s priority to the lowest platform-specific value possible.

Originally from https://docs.rs/lpt.

Windows

Uses SetThreadPriority() with THREAD_PRIORITY_IDLE (-15).

Unix

Uses libc::nice() with the max nice level.

On macOS and *BSD: +20 On Linux: +19