cpu_idle
The option documentation is properly formatted yet
Description: Relax host CPU usage when using fastest-possible CPU Example: 3 Default: Range: 0 - 10 Type: integer
When using fastest-possible CPU mode, the UAE core will, without idling, use as much host CPU as possible. This setting controls how often UAE performs a short sleep when 68000 STOP instructions are executed.
The default value for fastest-possible mode is 2. For exact or approximate CPU speeds, cpu_idle is not used.
See: [uae_cpu_throttle]
Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/cpu_idle