func (h *TimeHistogram) BucketMin(bucket int) time.Duration {
	return time.Duration(math.Exp(float64(bucket) * logDiv))
}

// ToHTML renders the histogram as HTML.
func (h *TimeHistogram) ToHTML(urlmaker func(min, max time.Duration) string) template.HTML {
	if h == nil || h.Count == 0 {
		return template.HTML("")
	}

	const barWidth = 400

	maxCount := 0
	for _, count := range h.Buckets {