--jobs=<integer, or a keyword ("auto", "HOST_CPUS", "HOST_RAM"), optionally followed by an operation ([-|*]<float>) eg. "auto", "HOST_CPUS*.5">
The number of concurrent jobs to run. Takes {@value FLAG_SYNTAX}. Values
must be between 1 and5000 values above 2500 may cause memory issues. "auto"
calculates a reasonable default based on host resources.