diff --git a/internal/op/hub.go b/internal/op/hub.go
index a583da3..7fd9ac3 100644
--- a/internal/op/hub.go
+++ b/internal/op/hub.go
@@ -14,9 +14,14 @@ import (
 	"github.com/zijiren233/gencontainer/rwmap"
 )
 
+type clients struct {
+	lock sync.RWMutex
+	m    map[*Client]struct{}
+}
+
 type Hub struct {
 	id        string
-	clients   rwmap.RWMap[string, *rwmap.RWMap[*Client, struct{}]]
+	clients   rwmap.RWMap[string, *clients]
 	broadcast chan *broadcastMessage
 	exit      chan struct{}
 	closed    uint32
@@ -66,8 +71,11 @@ func (h *Hub) serve() error {
 		select {
 		case message := <-h.broadcast:
 			h.devMessage(message.data)
-			h.clients.Range(func(id string, cli *rwmap.RWMap[*Client, struct{}]) bool {
-				cli.Range(func(c *Client, value struct{}) bool {
+			h.clients.Range(func(id string, clients *clients) bool {
+				clients.lock.RLock()
+				defer clients.lock.RUnlock()
+
+				for c := range clients.m {
 					if utils.In(message.ignoreId, c.u.ID) {
 						return true
 					}
@@ -75,11 +83,9 @@ func (h *Hub) serve() error {
 						return true
 					}
 					if err := c.Send(message.data); err != nil {
-						log.Debugf("hub: %s, write to client err: %s\nmessage: %+v", h.id, err, message)
 						c.Close()
 					}
-					return true
-				})
+				}
 
 				return true
 			})
@@ -122,7 +128,7 @@ func (h *Hub) ping() {
 
 func (h *Hub) devMessage(msg Message) {
 	switch msg.MessageType() {
-	case websocket.TextMessage:
+	case websocket.BinaryMessage:
 		log.Debugf("hub: %s, broadcast:\nmessage: %+v", h.id, msg.String())
 	}
 }
@@ -140,13 +146,12 @@ func (h *Hub) Close() error {
 		return ErrAlreadyClosed
 	}
 	close(h.exit)
-	h.clients.Range(func(id string, client *rwmap.RWMap[*Client, struct{}]) bool {
+	h.clients.Range(func(id string, clients *clients) bool {
 		h.clients.Delete(id)
-		client.Range(func(key *Client, value struct{}) bool {
-			client.Delete(key)
-			key.Close()
-			return true
-		})
+		for c := range clients.m {
+			delete(clients.m, c)
+			c.Close()
+		}
 		return true
 	})
 	h.wg.Wait()
@@ -181,11 +186,15 @@ func (h *Hub) RegClient(cli *Client) error {
 	if err != nil {
 		return err
 	}
-	c, _ := h.clients.LoadOrStore(cli.u.ID, &rwmap.RWMap[*Client, struct{}]{})
-	_, loaded := c.LoadOrStore(cli, struct{}{})
-	if loaded {
-		return errors.New("client already exist")
+	c, _ := h.clients.LoadOrStore(cli.u.ID, &clients{})
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	if c.m == nil {
+		c.m = make(map[*Client]struct{})
+	} else if _, ok := c.m[cli]; ok {
+		return errors.New("client already exists")
 	}
+	c.m[cli] = struct{}{}
 	return nil
 }
 
@@ -200,18 +209,14 @@ func (h *Hub) UnRegClient(cli *Client) error {
 	if !loaded {
 		return errors.New("client not found")
 	}
-	_, loaded2 := c.LoadAndDelete(cli)
-	if !loaded2 {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	if _, ok := c.m[cli]; !ok {
 		return errors.New("client not found")
 	}
-	if c.Len() == 0 {
-		if h.clients.CompareAndDelete(cli.u.ID, c) {
-			c.Range(func(key *Client, value struct{}) bool {
-				c.Delete(key)
-				h.RegClient(key)
-				return true
-			})
-		}
+	delete(c.m, cli)
+	if len(c.m) == 0 {
+		h.clients.CompareAndDelete(cli.u.ID, c)
 	}
 	return nil
 }
@@ -228,17 +233,12 @@ func (h *Hub) SendToUser(userID string, data Message) (err error) {
 	if !ok {
 		return nil
 	}
-	cli.Range(func(key *Client, value struct{}) bool {
-		if err = key.Send(data); err != nil {
-			cli.CompareAndDelete(key, value)
-			log.Debugf("hub: %s, write to client err: %s\nmessage: %+v", h.id, err, data)
-			key.Close()
+	cli.lock.RLock()
+	defer cli.lock.RUnlock()
+	for c := range cli.m {
+		if err = c.Send(data); err != nil {
+			c.Close()
 		}
-		return true
-	})
+	}
 	return
 }
-
-func (h *Hub) LoadClient(userID string) (*rwmap.RWMap[*Client, struct{}], bool) {
-	return h.clients.Load(userID)
-}
diff --git a/internal/op/room.go b/internal/op/room.go
index 5466c93..d40b146 100644
--- a/internal/op/room.go
+++ b/internal/op/room.go
@@ -9,7 +9,6 @@ import (
 	"github.com/synctv-org/synctv/internal/db"
 	"github.com/synctv-org/synctv/internal/model"
 	"github.com/synctv-org/synctv/utils"
-	"github.com/zijiren233/gencontainer/rwmap"
 	rtmps "github.com/zijiren233/livelib/server"
 	"github.com/zijiren233/stream"
 	"golang.org/x/crypto/bcrypt"
@@ -44,13 +43,6 @@ func (r *Room) Broadcast(data Message, conf ...BroadcastConf) error {
 	return r.hub.Broadcast(data, conf...)
 }
 
-func (r *Room) LoadClient(userID string) (*rwmap.RWMap[*Client, struct{}], bool) {
-	if r.hub == nil {
-		return nil, false
-	}
-	return r.hub.LoadClient(userID)
-}
-
 func (r *Room) SendToUser(user *User, data Message) error {
 	if r.hub == nil {
 		return nil