code: func NewTimer() Timer {
  	if !Enabled {
  		return NilTimer{}
  	}
  	return &StandardTimer{
  		histogram: NewHistogram(NewExpDecaySample(1028, 0.015)),
  		meter:     NewMeter(),
  	}
  }
docs: // NewTimer constructs a new StandardTimer using an exponentially-decaying
  // sample with the same reservoir size and alpha as UNIX load averages.
  // Be sure to call Stop() once the timer is of no use to allow for garbage collection.