code: func New(prof *profile.Profile, o *Options) *Report {
  	format := func(v int64) string {
  		if r := o.Ratio; r > 0 && r != 1 {
  			fv := float64(v) * r
  			v = int64(fv)
  		}
  		return measurement.ScaledLabel(v, o.SampleUnit, o.OutputUnit)
  	}
  	return &Report{prof, computeTotal(prof, o.SampleValue, o.SampleMeanDivisor),
  		o, format}
  }
docs: // New builds a new report indexing the sample values interpreting the
  // samples with the provided function.