func newLatencyTracker() *latencyTracker {
return &latencyTracker{
estimator: quantile.New(
quantile.Unknown(0.01),
quantile.Known(0.50, 0.01),
quantile.Known(0.95, 0.001),
quantile.Known(0.99, 0.0005),
quantile.Known(1.0, 0.0005),
),
started: time.Now(),
}
}
// Add implements the Add method of the Report interface by adding the given
// Result to Metrics.
func (m *Metrics) Add(r *Result) {
if m.StatusCodes == nil {
m.StatusCodes = map[string]int{}
}
if m.errors == nil {
m.Errors = []string{}
m.errors = map[string]struct{}{}
}
if m.latencies == nil {
m.latencies = quantile.New(
quantile.Known(0.50, 0.01),
quantile.Known(0.95, 0.001),
quantile.Known(0.99, 0.0005),
)
}
m.Requests++
m.StatusCodes[strconv.Itoa(int(r.Code))]++
m.Latencies.Total += r.Latency
m.BytesOut.Total += r.BytesOut
m.BytesIn.Total += r.BytesIn
m.latencies.Add(float64(r.Latency))
if m.Earliest.IsZero() || m.Earliest.After(r.Timestamp) {
m.Earliest = r.Timestamp
}
if r.Timestamp.After(m.Latest) {
m.Latest = r.Timestamp
}
if end := r.End(); end.After(m.End) {
m.End = end
}
if r.Latency > m.Latencies.Max {
m.Latencies.Max = r.Latency
}
if r.Code >= 200 && r.Code < 400 {
m.success++
}
if r.Error != "" {
if _, ok := m.errors[r.Error]; !ok {
m.errors[r.Error] = struct{}{}
m.Errors = append(m.Errors, r.Error)
}
}
}
func (m *Metrics) init() {
if m.StatusCodes == nil {
m.StatusCodes = map[string]int{}
}
if m.errors == nil {
m.errors = map[string]struct{}{}
}
if m.latencies == nil {
m.latencies = quantile.New(
quantile.Known(0.50, 0.01),
quantile.Known(0.95, 0.001),
quantile.Known(0.99, 0.0005),
)
}
}