diff --git a/worker.go b/worker.go
index 8562df3..a20f8b2 100644
--- a/worker.go
+++ b/worker.go
@@ -79,6 +79,8 @@ type output struct {
 	errors    int
 
 	med time.Duration // median of durations; calculated on first call to median()
+	pct90 time.Duration // max 9th decile durations; calculated on first call to percentile90()
+	max time.Duration // max of durations; calculated on first call to maximum()
 }
 
 func (o *output) median() time.Duration {
@@ -90,7 +92,29 @@ func (o *output) median() time.Duration {
 		o.med = o.durations[len(o.durations)/2]
 	}
 	return o.med
+}
+
+func (o *output) maximum() time.Duration {
+	if o.max == 0 {
+		// Sort durations and pick the middle one.
+		sort.Slice(o.durations, func(i, j int) bool {
+			return o.durations[i] < o.durations[j]
+		})
+		o.max = o.durations[len(o.durations)-1]
+	}
+	return o.max
+}
+
 
+func (o *output) percentile90() time.Duration {
+	if o.pct90 == 0 {
+		// Sort durations and pick the middle one.
+		sort.Slice(o.durations, func(i, j int) bool {
+			return o.durations[i] < o.durations[j]
+		})
+		o.pct90 = o.durations[len(o.durations)*9/10]
+	}
+	return o.pct90
 }
 
 type worker struct {
@@ -147,7 +171,7 @@ func (w *worker) reportAll(em map[string]config.Endpoint) {
 	sorted := w.sortOutput(em)
 	tr := tabwriter.NewWriter(os.Stdout, 3, 2, 2, ' ', 0)
 	for i, a := range sorted {
-		fmt.Fprintf(tr, "%2d.\t[%v]\t%v", i+1, a.region, a.median())
+		fmt.Fprintf(tr, "%2d.\t[%v]\t%v\t%v\t%v", i+1, a.region, a.median(), a.percentile90(), a.maximum())
 		if a.errors > 0 {
 			fmt.Fprintf(tr, "\t(%d errors)", a.errors)
 		}
@@ -167,9 +191,9 @@ func (w *worker) reportCSV(em map[string]config.Endpoint) {
 	close(w.inputs)
 
 	sorted := w.sortOutput(em)
-	fmt.Println("region,latency_ns,errors")
+	fmt.Println("region,latency_ns,latency_pct90_ns,latency_max_ns,errors")
 	for _, a := range sorted {
-		fmt.Printf("%v,%v,%v\n", a.region, a.median().Nanoseconds(), a.errors)
+		fmt.Printf("%v,%v,%v,%v,%v\n", a.region, a.median().Nanoseconds(), a.percentile90().Nanoseconds(), a.maximum().Nanoseconds(), a.errors)
 	}
 }