Better duration formatting in logs

log/formatters.go

@@ -0,0 +1,29 @@
+package log
+
+import (
+	"strings"
+	"time"
+)
+
+func ShortDur(d time.Duration) string {
+	var s string
+	switch {
+	case d > time.Hour:
+		s = d.Round(time.Minute).String()
+	case d > time.Minute:
+		s = d.Round(time.Second).String()
+	case d > time.Second:
+		s = d.Round(10 * time.Millisecond).String()
+	case d > time.Millisecond:
+		s = d.Round(100 * time.Microsecond).String()
+	default:
+		s = d.String()
+	}
+	if strings.HasSuffix(s, "m0s") {
+		s = s[:len(s)-2]
+	}
+	if strings.HasSuffix(s, "h0m") {
+		s = s[:len(s)-2]
+	}
+	return s
+}