func (k *KMS) Metrics(ctx context.Context) (*Metrics, error) {
	latency := make(map[time.Duration]uint64, len(k.latencyBuckets))
	for i, b := range k.latencyBuckets {
		latency[b] = k.latency[i].Load()
	}

	return &Metrics{
		ReqOK:   k.reqOK.Load(),
		ReqErr:  k.reqErr.Load(),
		ReqFail: k.reqFail.Load(),
		Latency: latency,
	}, nil
}

// Status returns status information about the KMS.
//

			metric.TotalDowntime = epHealth.offlineDuration
			metric.LastOnline = epHealth.lastOnline
			metric.Online = epHealth.Online
			metric.Latency = madmin.LatencyStat{
				Curr: epHealth.latency.curr,
				Avg:  epHealth.latency.avg,
				Max:  epHealth.latency.peak,
			}
		}
		m[dID] = metric
	}
	return m
}

func (srs *SRStatus) updateXferRate(sz int64, duration time.Duration) {

     * Calculate average send latency in microseconds
     *
     * @return average send latency
     */
    public double getAverageSendLatencyMicros() {
        long sends = rdmaSends.get();
        if (sends == 0) {
            return 0.0;
        }
        return totalSendTime.get() / (double) sends / 1000.0; // Convert to microseconds
    }

    /**
     * Calculate average receive latency in microseconds
     *

						resp, err := conn.Request(ctx, handlerTest, payload)
						latency += time.Since(t).Nanoseconds()
						if err != nil {
							if debugReqs {
								fmt.Println(err.Error())
							}
							b.Fatal(err.Error())
						}
						PutByteBuffer(resp)
						n++
					}
					atomic.AddInt64(&ops, int64(n))
					atomic.AddInt64(&lat, latency)
				})
				spent := time.Since(t)
				if spent > 0 && n > 0 {

					if hs, ok := h[t.URL().Host]; ok {
						t.TotalDowntime = hs.offlineDuration
						t.Online = hs.Online
						t.LastOnline = hs.lastOnline
						t.Latency = madmin.LatencyStat{
							Curr: hs.latency.curr,
							Avg:  hs.latency.avg,
							Max:  hs.latency.peak,
						}
					}
					targets = append(targets, t.Clone())
				}
			}
		}
		return targets
	}
	sys.RLock()
	defer sys.RUnlock()

	"github.com/minio/madmin-go/v3"
)

//go:generate msgp -file $GOFILE

// ReplicationLatency holds information of bucket operations latency, such us uploads
type ReplicationLatency struct {
	// Single & Multipart PUTs latency
	UploadHistogram LastMinuteHistogram
}

// Merge two replication latency into a new one
func (rl ReplicationLatency) merge(other ReplicationLatency) (newReplLatency ReplicationLatency) {

				return
			}
		case "Online":
			z.Online, err = dc.ReadBool()
			if err != nil {
				err = msgp.WrapError(err, "Online")
				return
			}
		case "Latency":
			err = z.Latency.DecodeMsg(dc)
			if err != nil {
				err = msgp.WrapError(err, "Latency")
				return
			}
		case "ReplicatedSize":
			z.ReplicatedSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "ReplicatedSize")

		if s < scannerMetricLastRealtime {
			p.latency[s].add(duration)
		}
	}
}

// time a scanner action.
// Use for s < scannerMetricLastRealtime
func (p *scannerMetrics) time(s scannerMetric) func() {
	startTime := time.Now()
	return func() {
		duration := time.Since(startTime)

		atomic.AddUint64(&p.operations[s], 1)
		if s < scannerMetricLastRealtime {
			p.latency[s].add(duration)
		}
	}
}

	// All fields must be accessed atomically and aligned.
	operations [osMetricLast]uint64
	latency    [osMetricLast]lockedLastMinuteLatency
}

// time an os action.
func (o *osMetrics) time(s osMetric) func() {
	startTime := time.Now()
	return func() {
		duration := time.Since(startTime)

		atomic.AddUint64(&o.operations[s], 1)
		o.latency[s].add(duration)
	}
}

A primary responsibility for any HTTP client is to efficiently manage network connections. Creating and establishing new connections require a fair amount of overhead and added latency. OkHttp will make every effort to reuse existing connections to avoid this overhead and added latency.