add min, max, and error count

test/loadtime/report/report.go

@@ -1,6 +1,7 @@
 package report
 
 import (
+	"math"
 	"time"
 
 	"github.com/tendermint/tendermint/test/loadtime/payload"
@@ -17,20 +18,37 @@ type Report struct {
 	Max, Min, Avg time.Duration
 	StdDev        int64
 	All           []time.Duration
+	ErrorCount    int
 }
 
 func GenerateFromBlockStore(s blockStore) (Report, error) {
-	r := Report{}
+	r := Report{
+		Max: 0,
+		Min: math.MaxInt64,
+	}
+	var sum int64
 	for i := s.Base(); i < s.Height(); i++ {
 		b := s.LoadBlock(i)
 		for _, tx := range b.Data.Txs {
 			p, err := payload.FromBytes(tx)
 			if err != nil {
-				return Report{}, err
+				r.ErrorCount++
+				continue
 			}
 			t := p.Time.AsTime().Sub(b.Time)
 			r.All = append(r.All, t)
+			if t > r.Max {
+				r.Max = t
+			} else if t < r.Min {
+				r.Min = t
+			}
+
+			// Using an int64 here makes an assumption about the scale and quantity of the data we are processing.
+			// If all latencies were 2 seconds, we would need around 4 billion records to overflow this.
+			// We are therefore assuming that the data does not exceed these bounds.
+			sum += int64(t)
 		}
 	}
+	r.Avg = time.Duration(sum / int64(len(r.All)))
 	return r, nil
 }