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Current number of worker threads available to the Unity JobQueue.
By default, this property takes the value of JobWorkerMaximumCount. You can set the value of this property at runtime to dynamically reduce the number worker threads available to the Unity Job Queue. This can have the effect of saving power, or reducing the CPU load on a shared or virtual machine. This is useful if you have multiple instances of a game running as a server, and you want to prevent any single instance from monopolizing the resources of the machine.
You cannot set this value below 1, or above the value of the JobWorkerMaximumCount property. Trying to do so will throw an "out of range" exception.
On some platforms (eg. Android) Unity will automatically adjust this value at runtime in response to the operating system indicating that the number of available cores has changed. This can occur if the device has gone into, or come out of, power-saving mode. However if you set this property manually to any valid value, Unity will stop any automatic adjustment (thus ignoring any requests from the operating system). You can restore the automatic adjustment mode by calling ResetJobWorkerCount.