diff --git a/README.md b/README.md
index 298ae55..4c9d656 100644
--- a/README.md
+++ b/README.md
@@ -478,6 +478,70 @@ func Encode(b []byte) string
 ```
 </details>
 
+### 高性能 Hash 方法及生成器
+
+见: [xhash](xhash)
+
+<details>
+  <summary>DOC</summary>
+
+```go
+package xhash // import "github.com/fufuok/utils/xhash"
+
+func AddBytes32(h uint32, b []byte) uint32
+func AddBytes64(h uint64, b []byte) uint64
+func AddString32(h uint32, s string) uint32
+func AddString64(h uint64, s string) uint64
+func AddUint32(h, u uint32) uint32
+func AddUint64(h uint64, u uint64) uint64
+func Djb33(s string) uint32
+func FnvHash(s string) uint64
+func FnvHash32(s string) uint32
+func GenHasher[K comparable]() func(K) uintptr
+func GenHasher64[K comparable]() func(K) uint64
+func GenSeedHasher64[K comparable]() func(maphash.Seed, K) uint64
+func Hash(b []byte, h hash.Hash) []byte
+func HashBytes(b ...[]byte) string
+func HashBytes32(b ...[]byte) uint32
+func HashBytes64(b ...[]byte) uint64
+func HashSeedString(seed maphash.Seed, s string) uint64
+func HashSeedUint64(seed maphash.Seed, n uint64) uint64
+func HashString(s ...string) string
+func HashString32(s ...string) uint32
+func HashString64(s ...string) uint64
+func HashUint32(u uint32) uint32
+func HashUint64(u uint64) uint64
+func Hmac(b []byte, key []byte, h func() hash.Hash) []byte
+func HmacSHA1(b, key []byte) []byte
+func HmacSHA1Hex(s, key string) string
+func HmacSHA256(b, key []byte) []byte
+func HmacSHA256Hex(s, key string) string
+func HmacSHA512(b, key []byte) []byte
+func HmacSHA512Hex(s, key string) string
+func MD5(b []byte) []byte
+func MD5BytesHex(bs []byte) string
+func MD5Hex(s string) string
+func MD5Reader(r io.Reader) (string, error)
+func MD5Sum(filename string) (string, error)
+func MemHash(s string) uint64
+func MemHash32(s string) uint32
+func MemHashb(b []byte) uint64
+func MemHashb32(b []byte) uint32
+func MustMD5Sum(filename string) string
+func Sha1(b []byte) []byte
+func Sha1Hex(s string) string
+func Sha256(b []byte) []byte
+func Sha256Hex(s string) string
+func Sha512(b []byte) []byte
+func Sha512Hex(s string) string
+func Sum32(s string) uint32
+func Sum64(s string) uint64
+func SumBytes32(bs []byte) uint32
+func SumBytes64(bs []byte) uint64
+type Hashable interface{ ... }
+```
+</details>
+
 ### 可排序全局唯一 ID 生成器
 
 比 UUID 更快, 更短
@@ -1036,8 +1100,8 @@ func main() {
 	bus := sched.New() // 默认并发数: runtime.NumCPU()
 	for i := 0; i < 30; i++ {
 		bus.Add(1)
-		bus.RunWithArgs(func(n interface{}) {
-			count.Add(int64(n.(int)))
+		bus.RunWithArgs(func(n ...interface{}) {
+			count.Add(int64(n[0].(int)))
 		}, i)
 	}
 	bus.Wait()
diff --git a/ntp/ntpdate.go b/ntp/ntpdate.go
index b8a67b4..6484663 100644
--- a/ntp/ntpdate.go
+++ b/ntp/ntpdate.go
@@ -113,8 +113,8 @@ func HostPreferred(hosts []string) *HostResponse {
 	s := sched.New()
 	for _, host := range hosts {
 		s.Add(1)
-		s.RunWithArgs(func(v interface{}) {
-			host := v.(string)
+		s.RunWithArgs(func(v ...interface{}) {
+			host := v[0].(string)
 			if resp := GetResponse(host); resp != nil {
 				m.Store(host, resp)
 			}
diff --git a/sched/DOC.md b/sched/DOC.md
index a68438c..d89d920 100644
--- a/sched/DOC.md
+++ b/sched/DOC.md
@@ -17,7 +17,7 @@ import "github.com/fufuok/utils/sched"
   - [func (p *Pool) IsRunning() bool](<#func-pool-isrunning>)
   - [func (p *Pool) Release()](<#func-pool-release>)
   - [func (p *Pool) Run(f ...func())](<#func-pool-run>)
-  - [func (p *Pool) RunWithArgs(f func(args interface{}), args interface{})](<#func-pool-runwithargs>)
+  - [func (p *Pool) RunWithArgs(f func(args ...interface{}), args ...interface{})](<#func-pool-runwithargs>)
   - [func (p *Pool) Running() uint64](<#func-pool-running>)
   - [func (p *Pool) Wait()](<#func-pool-wait>)
   - [func (p *Pool) WaitAndRelease()](<#func-pool-waitandrelease>)
@@ -94,7 +94,7 @@ Run runs f in the current pool.
 ### func \(\*Pool\) RunWithArgs
 
 ```go
-func (p *Pool) RunWithArgs(f func(args interface{}), args interface{})
+func (p *Pool) RunWithArgs(f func(args ...interface{}), args ...interface{})
 ```
 
 ### func \(\*Pool\) Running
diff --git a/sched/README.md b/sched/README.md
index 6a488f8..24269fa 100644
--- a/sched/README.md
+++ b/sched/README.md
@@ -30,12 +30,12 @@ import (
 )
 
 func main() {
-	var count xsync.Counter
+	count := xsync.NewCounter()
 	bus := sched.New() // 默认并发数: runtime.NumCPU()
 	for i := 0; i < 30; i++ {
 		bus.Add(1)
-		bus.RunWithArgs(func(n interface{}) {
-			count.Add(int64(n.(int)))
+		bus.RunWithArgs(func(n ...interface{}) {
+			count.Add(int64(n[0].(int)))
 		}, i)
 	}
 	bus.Wait()
diff --git a/sched/examples/main.go b/sched/examples/main.go
index de386ad..f9a1a67 100644
--- a/sched/examples/main.go
+++ b/sched/examples/main.go
@@ -9,12 +9,12 @@ import (
 )
 
 func main() {
-	var count xsync.Counter
+	count := xsync.NewCounter()
 	bus := sched.New() // 默认并发数: runtime.NumCPU()
 	for i := 0; i < 30; i++ {
 		bus.Add(1)
-		bus.RunWithArgs(func(n interface{}) {
-			count.Add(int64(n.(int)))
+		bus.RunWithArgs(func(n ...interface{}) {
+			count.Add(int64(n[0].(int)))
 		}, i)
 	}
 	bus.Wait()
diff --git a/sched/sched.go b/sched/sched.go
index b827a0e..5a015af 100644
--- a/sched/sched.go
+++ b/sched/sched.go
@@ -20,8 +20,8 @@ type Pool struct {
 
 type funcdata struct {
 	fn func()
-	fg func(interface{})
-	ar interface{}
+	fg func(...interface{})
+	ar []interface{}
 }
 
 // Option is a scheduler option.
@@ -68,7 +68,7 @@ func New(opts ...Option) *Pool {
 				if d.fn != nil {
 					d.fn()
 				} else {
-					d.fg(d.ar)
+					d.fg(d.ar...)
 				}
 				p.complete()
 			}
@@ -85,7 +85,7 @@ func (p *Pool) Run(f ...func()) {
 	}
 }
 
-func (p *Pool) RunWithArgs(f func(args interface{}), args interface{}) {
+func (p *Pool) RunWithArgs(f func(args ...interface{}), args ...interface{}) {
 	p.tasks <- funcdata{fg: f, ar: args}
 }
 
diff --git a/sched/sched_test.go b/sched/sched_test.go
index 79252ca..dac2e64 100644
--- a/sched/sched_test.go
+++ b/sched/sched_test.go
@@ -16,15 +16,33 @@ func TestSched(t *testing.T) {
 	s.Add(10)
 	sum := uint32(0)
 	for i := 0; i < 10; i++ {
-		s.RunWithArgs(func(n interface{}) {
-			atomic.AddUint32(&sum, uint32(n.(int)))
-		}, i)
+		s.RunWithArgs(func(n ...interface{}) {
+			atomic.AddUint32(&sum, uint32(n[0].(int)))
+			atomic.AddUint32(&sum, -uint32(n[1].(int)))
+		}, i, i)
+	}
+	s.Wait()
+	if sum != 0 {
+		t.Fatalf("wrong sum, expect: %d, want %d", 0, sum)
+	}
+
+	s.Add(10)
+	sum = uint32(0)
+	for i := 0; i < 10; i++ {
+		ii := uint32(i)
+		s.RunWithArgs(func(_ ...interface{}) {
+			atomic.AddUint32(&sum, ii)
+		})
 	}
 	s.Wait()
 	if sum != 45 {
 		t.Fatalf("wrong sum, expect: %d, want %d", 45, sum)
 	}
 
+	if s.Running() != 0 {
+		t.Fatalf("wrong counter inside the pool")
+	}
+
 	s.Add(10)
 	sum = uint32(0)
 	for i := 0; i < 10; i++ {
@@ -87,8 +105,8 @@ func BenchmarkSched(b *testing.B) {
 		b.ReportAllocs()
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
-			l.RunWithArgs(func(x interface{}) {
-				_ = x
+			l.RunWithArgs(func(x ...interface{}) {
+				_ = x[0]
 			}, 42)
 		}
 		l.Wait()