diff --git a/log/format.go b/log/format.go
index 4d2bae5d..38495feb 100644
--- a/log/format.go
+++ b/log/format.go
@@ -36,15 +36,16 @@ func (f Formatter) Format(ctx context.Context, level Level, tag string, message
 	if tag != "" {
 		message = tag + ": " + message
 	}
-	var id uint32
+	var id ID
 	var hasId bool
 	if ctx != nil {
 		id, hasId = IDFromContext(ctx)
 	}
 	if hasId {
+		activeDuration := formatDuration(time.Since(id.CreatedAt))
 		if !f.DisableColors {
 			var color aurora.Color
-			color = aurora.Color(uint8(id))
+			color = aurora.Color(uint8(id.ID))
 			color %= 215
 			row := uint(color / 36)
 			column := uint(color % 36)
@@ -62,9 +63,9 @@ func (f Formatter) Format(ctx context.Context, level Level, tag string, message
 			color += 16
 			color = color << 16
 			color |= 1 << 14
-			message = F.ToString("[", aurora.Colorize(id, color).String(), "] ", message)
+			message = F.ToString("[", aurora.Colorize(id.ID, color).String(), " ", activeDuration, "] ", message)
 		} else {
-			message = F.ToString("[", id, "] ", message)
+			message = F.ToString("[", id.ID, " ", activeDuration, "] ", message)
 		}
 	}
 	switch {
@@ -99,15 +100,16 @@ func (f Formatter) FormatWithSimple(ctx context.Context, level Level, tag string
 		message = tag + ": " + message
 	}
 	messageSimple := message
-	var id uint32
+	var id ID
 	var hasId bool
 	if ctx != nil {
 		id, hasId = IDFromContext(ctx)
 	}
 	if hasId {
+		activeDuration := formatDuration(time.Since(id.CreatedAt))
 		if !f.DisableColors {
 			var color aurora.Color
-			color = aurora.Color(uint8(id))
+			color = aurora.Color(uint8(id.ID))
 			color %= 215
 			row := uint(color / 36)
 			column := uint(color % 36)
@@ -125,11 +127,11 @@ func (f Formatter) FormatWithSimple(ctx context.Context, level Level, tag string
 			color += 16
 			color = color << 16
 			color |= 1 << 14
-			message = F.ToString("[", aurora.Colorize(id, color).String(), "] ", message)
+			message = F.ToString("[", aurora.Colorize(id.ID, color).String(), " ", activeDuration, "] ", message)
 		} else {
-			message = F.ToString("[", id, "] ", message)
+			message = F.ToString("[", id.ID, " ", activeDuration, "] ", message)
 		}
-		messageSimple = F.ToString("[", id, "] ", messageSimple)
+		messageSimple = F.ToString("[", id.ID, " ", activeDuration, "] ", messageSimple)
 
 	}
 	switch {
@@ -153,3 +155,13 @@ func xd(value int, x int) string {
 	}
 	return message
 }
+
+func formatDuration(duration time.Duration) string {
+	if duration < time.Second {
+		return F.ToString(duration.Milliseconds(), "ms")
+	} else if duration < time.Minute {
+		return F.ToString(int64(duration.Seconds()), ".", int64(duration.Seconds()*100)%100, "s")
+	} else {
+		return F.ToString(int64(duration.Minutes()), "m", int64(duration.Seconds())%60, "s")
+	}
+}
diff --git a/log/id.go b/log/id.go
index 3ced3cb2..19e19d55 100644
--- a/log/id.go
+++ b/log/id.go
@@ -3,6 +3,7 @@ package log
 import (
 	"context"
 	"math/rand"
+	"time"
 
 	"github.com/sagernet/sing/common/random"
 )
@@ -13,11 +14,19 @@ func init() {
 
 type idKey struct{}
 
-func ContextWithNewID(ctx context.Context) context.Context {
-	return context.WithValue(ctx, (*idKey)(nil), rand.Uint32())
+type ID struct {
+	ID        uint32
+	CreatedAt time.Time
 }
 
-func IDFromContext(ctx context.Context) (uint32, bool) {
-	id, loaded := ctx.Value((*idKey)(nil)).(uint32)
+func ContextWithNewID(ctx context.Context) context.Context {
+	return context.WithValue(ctx, (*idKey)(nil), ID{
+		ID:        rand.Uint32(),
+		CreatedAt: time.Now(),
+	})
+}
+
+func IDFromContext(ctx context.Context) (ID, bool) {
+	id, loaded := ctx.Value((*idKey)(nil)).(ID)
 	return id, loaded
 }