diff --git a/internal/caches/list_memory_test.go b/internal/caches/list_memory_test.go
index 9dcf5f8..4ea1aa9 100644
--- a/internal/caches/list_memory_test.go
+++ b/internal/caches/list_memory_test.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"github.com/TeaOSLab/EdgeNode/internal/caches"
 	"github.com/TeaOSLab/EdgeNode/internal/utils/testutils"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/logs"
 	"github.com/iwind/TeaGo/rands"
 	"github.com/iwind/TeaGo/types"
diff --git a/internal/caches/storage_memory.go b/internal/caches/storage_memory.go
index 9dce30a..a5c4667 100644
--- a/internal/caches/storage_memory.go
+++ b/internal/caches/storage_memory.go
@@ -12,7 +12,7 @@ import (
 	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	setutils "github.com/TeaOSLab/EdgeNode/internal/utils/sets"
 	"github.com/TeaOSLab/EdgeNode/internal/zero"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/types"
 	"math"
 	"runtime"
diff --git a/internal/caches/utils_test.go b/internal/caches/utils_test.go
index 4da2e64..8bdce19 100644
--- a/internal/caches/utils_test.go
+++ b/internal/caches/utils_test.go
@@ -5,7 +5,7 @@ package caches_test
 import (
 	"fmt"
 	"github.com/TeaOSLab/EdgeNode/internal/caches"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/types"
 	"strconv"
 	"testing"
diff --git a/internal/caches/writer_memory.go b/internal/caches/writer_memory.go
index 7efa960..2829266 100644
--- a/internal/caches/writer_memory.go
+++ b/internal/caches/writer_memory.go
@@ -3,7 +3,7 @@ package caches
 import (
 	"errors"
 	"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/types"
 	"sync"
 	"sync/atomic"
diff --git a/internal/nodes/http_request_root.go b/internal/nodes/http_request_root.go
index 15ccbf8..eed79e2 100644
--- a/internal/nodes/http_request_root.go
+++ b/internal/nodes/http_request_root.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	rangeutils "github.com/TeaOSLab/EdgeNode/internal/utils/ranges"
 	"github.com/TeaOSLab/EdgeNode/internal/zero"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/Tea"
 	"github.com/iwind/TeaGo/logs"
 	"github.com/iwind/TeaGo/types"
diff --git a/internal/remotelogs/utils.go b/internal/remotelogs/utils.go
index 3d9589c..3a3be56 100644
--- a/internal/remotelogs/utils.go
+++ b/internal/remotelogs/utils.go
@@ -8,7 +8,7 @@ import (
 	"github.com/TeaOSLab/EdgeNode/internal/goman"
 	"github.com/TeaOSLab/EdgeNode/internal/rpc"
 	"github.com/TeaOSLab/EdgeNode/internal/trackers"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/Tea"
 	"github.com/iwind/TeaGo/logs"
 	"github.com/iwind/TeaGo/maps"
diff --git a/internal/ttlcache/cache.go b/internal/ttlcache/cache.go
index 89cd909..7090d49 100644
--- a/internal/ttlcache/cache.go
+++ b/internal/ttlcache/cache.go
@@ -99,7 +99,7 @@ func (this *Cache[T]) Write(key string, value T, expiredAt int64) (ok bool) {
 	if expiredAt > maxExpiredAt {
 		expiredAt = maxExpiredAt
 	}
-	var uint64Key = HashKey([]byte(key))
+	var uint64Key = HashKeyString(key)
 	var pieceIndex = uint64Key % this.countPieces
 	return this.pieces[pieceIndex].Add(uint64Key, &Item[T]{
 		Value:     value,
@@ -121,18 +121,18 @@ func (this *Cache[T]) IncreaseInt64(key string, delta T, expiredAt int64, extend
 	if expiredAt > maxExpiredAt {
 		expiredAt = maxExpiredAt
 	}
-	var uint64Key = HashKey([]byte(key))
+	var uint64Key = HashKeyString(key)
 	var pieceIndex = uint64Key % this.countPieces
 	return this.pieces[pieceIndex].IncreaseInt64(uint64Key, delta, expiredAt, extend)
 }
 
 func (this *Cache[T]) Read(key string) (item *Item[T]) {
-	var uint64Key = HashKey([]byte(key))
+	var uint64Key = HashKeyString(key)
 	return this.pieces[uint64Key%this.countPieces].Read(uint64Key)
 }
 
 func (this *Cache[T]) Delete(key string) {
-	var uint64Key = HashKey([]byte(key))
+	var uint64Key = HashKeyString(key)
 	this.pieces[uint64Key%this.countPieces].Delete(uint64Key)
 }
 
diff --git a/internal/ttlcache/utils.go b/internal/ttlcache/utils.go
index 59ff78b..12568e6 100644
--- a/internal/ttlcache/utils.go
+++ b/internal/ttlcache/utils.go
@@ -1,7 +1,11 @@
 package ttlcache
 
-import "github.com/cespare/xxhash"
+import "github.com/cespare/xxhash/v2"
 
-func HashKey(key []byte) uint64 {
+func HashKeyBytes(key []byte) uint64 {
 	return xxhash.Sum64(key)
 }
+
+func HashKeyString(key string) uint64 {
+	return xxhash.Sum64String(key)
+}
diff --git a/internal/ttlcache/utils_test.go b/internal/ttlcache/utils_test.go
index 7d395e9..f6b6c19 100644
--- a/internal/ttlcache/utils_test.go
+++ b/internal/ttlcache/utils_test.go
@@ -1,19 +1,50 @@
-package ttlcache
+package ttlcache_test
 
 import (
+	"github.com/TeaOSLab/EdgeNode/internal/ttlcache"
+	"github.com/TeaOSLab/EdgeNode/internal/utils/testutils"
+	"github.com/TeaOSLab/EdgeNode/internal/zero"
 	"github.com/cespare/xxhash/v2"
 	"runtime"
+	"strconv"
 	"testing"
 )
 
-func BenchmarkHashKey(b *testing.B) {
+func TestHashCollision(t *testing.T) {
+	var m = map[uint64]zero.Zero{}
+
+	var count = 1_000
+	if testutils.IsSingleTesting() {
+		count = 100_000_000
+	}
+
+	for i := 0; i < count; i++ {
+		var k = ttlcache.HashKeyString(strconv.Itoa(i))
+		_, ok := m[k]
+		if ok {
+			t.Fatal("collision at", i)
+		}
+		m[k] = zero.New()
+	}
+
+	t.Log(len(m), "elements")
+}
+
+func BenchmarkHashKey_Bytes(b *testing.B) {
 	runtime.GOMAXPROCS(1)
 	for i := 0; i < b.N; i++ {
-		HashKey([]byte("HELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLD"))
+		ttlcache.HashKeyBytes([]byte("HELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLD"))
 	}
 }
 
-func BenchmarkHashKey2(b *testing.B) {
+func BenchmarkHashKey_String(b *testing.B) {
+	runtime.GOMAXPROCS(1)
+	for i := 0; i < b.N; i++ {
+		ttlcache.HashKeyString("HELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLD")
+	}
+}
+
+func BenchmarkHashKey_XXHash(b *testing.B) {
 	runtime.GOMAXPROCS(1)
 	for i := 0; i < b.N; i++ {
 		xxhash.Sum64String("HELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLD")
diff --git a/internal/utils/counters/counter.go b/internal/utils/counters/counter.go
index 7b020bc..1e12a9d 100644
--- a/internal/utils/counters/counter.go
+++ b/internal/utils/counters/counter.go
@@ -7,7 +7,7 @@ import (
 	"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
 	memutils "github.com/TeaOSLab/EdgeNode/internal/utils/mem"
 	syncutils "github.com/TeaOSLab/EdgeNode/internal/utils/sync"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"sync"
 	"time"
 )
diff --git a/internal/utils/fnv/hash_test.go b/internal/utils/fnv/hash_test.go
index b889f0f..f1aa3b0 100644
--- a/internal/utils/fnv/hash_test.go
+++ b/internal/utils/fnv/hash_test.go
@@ -22,3 +22,11 @@ func BenchmarkHashString(b *testing.B) {
 		}
 	})
 }
+
+func BenchmarkHashString_Long(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_ = fnv.HashString("HELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLDHELLO,WORLD")
+		}
+	})
+}
diff --git a/internal/waf/rule_set_test.go b/internal/waf/rule_set_test.go
index 0d6ce76..7714943 100644
--- a/internal/waf/rule_set_test.go
+++ b/internal/waf/rule_set_test.go
@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"github.com/TeaOSLab/EdgeNode/internal/waf"
 	"github.com/TeaOSLab/EdgeNode/internal/waf/requests"
-	"github.com/cespare/xxhash"
+	"github.com/cespare/xxhash/v2"
 	"github.com/iwind/TeaGo/assert"
 	"github.com/iwind/TeaGo/maps"
 	"net/http"