func NewScaler()

in benchstat/scaler.go [20:78]

• 54 lines of code
• 22 McCabe index (conditional complexity)

func NewScaler(val float64, unit string) Scaler {
	if hasBaseUnit(unit, "ns/op") || hasBaseUnit(unit, "ns/GC") {
		return timeScaler(val)
	}

	var format string
	var scale float64
	var suffix string

	prescale := 1.0
	if hasBaseUnit(unit, "MB/s") {
		prescale = 1e6
	}

	switch x := val * prescale; {
	case x >= 99500000000000:
		format, scale, suffix = "%.0f", 1e12, "T"
	case x >= 9950000000000:
		format, scale, suffix = "%.1f", 1e12, "T"
	case x >= 995000000000:
		format, scale, suffix = "%.2f", 1e12, "T"
	case x >= 99500000000:
		format, scale, suffix = "%.0f", 1e9, "G"
	case x >= 9950000000:
		format, scale, suffix = "%.1f", 1e9, "G"
	case x >= 995000000:
		format, scale, suffix = "%.2f", 1e9, "G"
	case x >= 99500000:
		format, scale, suffix = "%.0f", 1e6, "M"
	case x >= 9950000:
		format, scale, suffix = "%.1f", 1e6, "M"
	case x >= 995000:
		format, scale, suffix = "%.2f", 1e6, "M"
	case x >= 99500:
		format, scale, suffix = "%.0f", 1e3, "k"
	case x >= 9950:
		format, scale, suffix = "%.1f", 1e3, "k"
	case x >= 995:
		format, scale, suffix = "%.2f", 1e3, "k"
	case x >= 99.5:
		format, scale, suffix = "%.0f", 1, ""
	case x >= 9.95:
		format, scale, suffix = "%.1f", 1, ""
	default:
		format, scale, suffix = "%.2f", 1, ""
	}

	if hasBaseUnit(unit, "B/op") || hasBaseUnit(unit, "bytes/op") || hasBaseUnit(unit, "bytes") {
		suffix += "B"
	}
	if hasBaseUnit(unit, "MB/s") {
		suffix += "B/s"
	}
	scale /= prescale

	return func(val float64) string {
		return fmt.Sprintf(format+suffix, val/scale)
	}
}