metric.go

package stats

type metric struct {
	value float64
	ts    int64
}

func calculateRate(v1, v2 metric) float64 {
	diff := v2.value - v1.value
	interval := float64(v2.ts - v1.ts)
	if diff <= float64(0) || interval <= float64(0) {
		return float64(0)
	}
	return diff / interval
}