processorLoad(platform = process.platform) {
    // The os.loadavg() call works on win32, but never returns correct
    // data.  Better to intercept and warn that it's unsupported.
    if (platform === 'win32') {
      logger.warn(`Processor load is unsupported on the '${platform}' platform.`);

      return null;
    }

    return os.loadavg();
  }
Determines the average processor load across the system.  This is
expressed as a fractional number between 0 and the number of logical
processors.

@private
@method processorLoad
@param {String=process.platform} platform The current hardware platform.
                                          USED FOR TESTING ONLY.
@return {Array<Number>} The one-, five-, and fifteen-minute processor load
                        averages.