measure.go
func (m *MeasuredReader) BytesPerSec() uint64 {
	return uint64(m.rate.Rate(time.Second))
}
func (m *MeasuredReader) BytesPerSec() uint64 {
	return uint64(m.rate.Rate(time.Second))
}
func ( m * MeasuredReader ) BytesPerSec ( ) uint64 { return uint64 ( m . rate . Rate ( time . Second ) ) }
// BytesPerSec tells the rate per second at which bytes were read since last
// measurement.
BytesPerSec tells the rate per second at which bytes were read since last measurement .