diff --git a/internal/utils/counters/counter.go b/internal/utils/counters/counter.go
index 995bb11..fc98c93 100644
--- a/internal/utils/counters/counter.go
+++ b/internal/utils/counters/counter.go
@@ -3,10 +3,11 @@
 package counters
 
 import (
+	"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
 	syncutils "github.com/TeaOSLab/EdgeNode/internal/utils/sync"
 	"github.com/cespare/xxhash"
-	"github.com/iwind/TeaGo/Tea"
 	"runtime"
+	"sync"
 	"time"
 )
 
@@ -17,6 +18,7 @@ type Counter struct {
 
 	gcTicker *time.Ticker
 	gcIndex  int
+	gcLocker sync.Mutex
 }
 
 // NewCounter create new counter
@@ -24,6 +26,8 @@ func NewCounter() *Counter {
 	var count = runtime.NumCPU() * 4
 	if count < 8 {
 		count = 8
+	} else if count > 128 {
+		count = 128
 	}
 
 	var itemMaps = []map[uint64]*Item{}
@@ -45,10 +49,7 @@ func (this *Counter) WithGC() *Counter {
 	if this.gcTicker != nil {
 		return this
 	}
-	this.gcTicker = time.NewTicker(10 * time.Second)
-	if Tea.IsTesting() {
-		this.gcTicker = time.NewTicker(1 * time.Second)
-	}
+	this.gcTicker = time.NewTicker(1 * time.Second)
 	go func() {
 		for range this.gcTicker.C {
 			this.GC()
@@ -141,6 +142,7 @@ func (this *Counter) TotalItems() int {
 
 // GC garbage expired items
 func (this *Counter) GC() {
+	this.gcLocker.Lock()
 	var gcIndex = this.gcIndex
 
 	this.gcIndex++
@@ -148,11 +150,15 @@ func (this *Counter) GC() {
 		this.gcIndex = 0
 	}
 
+	this.gcLocker.Unlock()
+
+	var currentTime = fasttime.Now().Unix()
+
 	this.locker.RLock(gcIndex)
 	var itemMap = this.itemMaps[gcIndex]
 	var expiredKeys = []uint64{}
 	for key, item := range itemMap {
-		if item.IsExpired() {
+		if item.IsExpired(currentTime) {
 			expiredKeys = append(expiredKeys, key)
 		}
 	}
diff --git a/internal/utils/counters/counter_test.go b/internal/utils/counters/counter_test.go
index ed5d991..b742809 100644
--- a/internal/utils/counters/counter_test.go
+++ b/internal/utils/counters/counter_test.go
@@ -6,7 +6,9 @@ import (
 	"github.com/TeaOSLab/EdgeNode/internal/utils/counters"
 	"github.com/TeaOSLab/EdgeNode/internal/utils/testutils"
 	"github.com/iwind/TeaGo/assert"
+	"github.com/iwind/TeaGo/rands"
 	"github.com/iwind/TeaGo/types"
+	timeutil "github.com/iwind/TeaGo/utils/time"
 	"runtime"
 	"sync/atomic"
 	"testing"
@@ -54,9 +56,21 @@ func TestCounter_GC(t *testing.T) {
 }
 
 func TestCounter_GC2(t *testing.T) {
-	var counter = counters.NewCounter()
-	for i := 0; i < runtime.NumCPU()*32; i++ {
-		counter.GC()
+	if !testutils.IsSingleTesting() {
+		return
+	}
+
+	var counter = counters.NewCounter().WithGC()
+	for i := 0; i < 1e5; i++ {
+		counter.Increase(uint64(i), rands.Int(10, 300))
+	}
+
+	var ticker = time.NewTicker(1 * time.Second)
+	for range ticker.C {
+		t.Log(timeutil.Format("H:i:s"), counter.TotalItems())
+		if counter.TotalItems() == 0 {
+			break
+		}
 	}
 }
 
@@ -140,4 +154,6 @@ func BenchmarkCounter_GC(b *testing.B) {
 			counter.GC()
 		}
 	})
+
+	//b.Log(counter.TotalItems())
 }
diff --git a/internal/utils/counters/item.go b/internal/utils/counters/item.go
index ffd21a2..41c67c6 100644
--- a/internal/utils/counters/item.go
+++ b/internal/utils/counters/item.go
@@ -72,6 +72,6 @@ func (this *Item) Reset() {
 	}
 }
 
-func (this *Item) IsExpired() bool {
-	return this.lastUpdateTime < fasttime.Now().Unix()-this.lifeSeconds-this.spanSeconds
+func (this *Item) IsExpired(currentTime int64) bool {
+	return this.lastUpdateTime < currentTime-this.lifeSeconds-this.spanSeconds
 }
diff --git a/internal/utils/counters/item_test.go b/internal/utils/counters/item_test.go
index 3da656f..391b817 100644
--- a/internal/utils/counters/item_test.go
+++ b/internal/utils/counters/item_test.go
@@ -35,12 +35,14 @@ func TestItem_IsExpired(t *testing.T) {
 		return
 	}
 
+	var currentTime = time.Now().Unix()
+
 	var item = counters.NewItem(10)
-	t.Log(item.IsExpired())
+	t.Log(item.IsExpired(currentTime))
 	time.Sleep(10 * time.Second)
-	t.Log(item.IsExpired())
+	t.Log(item.IsExpired(currentTime))
 	time.Sleep(2 * time.Second)
-	t.Log(item.IsExpired())
+	t.Log(item.IsExpired(currentTime))
 }
 
 func BenchmarkItem_Increase(b *testing.B) {