diff --git a/wshandler/room.go b/wshandler/room.go
index b807e42..decb7c6 100644
--- a/wshandler/room.go
+++ b/wshandler/room.go
@@ -93,10 +93,14 @@ func (r *room) loop(ctx context.Context, conns *map[string]*wsconn) (normalEnd b
 			enc.Encode(ds)
 
 			for _, conn := range *conns {
-				r.sendMsgChan <- send_msg_queue_elem{
-					to:  conn,
-					mt:  websocket.TextMessage,
-					msg: buff.Bytes(),
+				pmsg, err := websocket.NewPreparedMessage(websocket.TextMessage, buff.Bytes())
+				if err != nil {
+					logger.Println("websocket.NewPreparedMessage failed :", err)
+				} else {
+					r.sendMsgChan <- send_msg_queue_elem{
+						to:   conn,
+						pmsg: pmsg,
+					}
 				}
 			}
 		}
diff --git a/wshandler/wshandler.go b/wshandler/wshandler.go
index d3a765c..c323dc3 100644
--- a/wshandler/wshandler.go
+++ b/wshandler/wshandler.go
@@ -81,9 +81,9 @@ type EventReceiver interface {
 }
 
 type send_msg_queue_elem struct {
-	to  *wsconn
-	mt  int
-	msg []byte
+	to   *wsconn
+	pmsg *websocket.PreparedMessage
+	//msg  []byte
 }
 
 type websocketHandlerBase struct {
@@ -137,7 +137,7 @@ func NewWebsocketHandler(consumer session.Consumer, redisUrl string) (*Websocket
 			defer func() {
 				r := recover()
 				if r != nil {
-					logger.Println("send_msg_queue_elem sender recover :", r, string(elem.msg))
+					logger.Println("send_msg_queue_elem sender recover :", r)
 				}
 			}()
 			if elem == nil {
@@ -147,7 +147,7 @@ func NewWebsocketHandler(consumer session.Consumer, redisUrl string) (*Websocket
 				return
 			}
 
-			elem.to.WriteMessage(elem.mt, elem.msg)
+			elem.to.WritePreparedMessage(elem.pmsg)
 		}
 
 		for elem := range sendchan {
@@ -327,10 +327,15 @@ func (ws *WebsocketHandler) mainLoop(ctx context.Context) {
 			Body:  usermsg.Body,
 			Tag:   usermsg.Tag,
 		})
+		pmsg, err := websocket.NewPreparedMessage(websocket.TextMessage, ds)
+		if err != nil {
+			logger.Println("websocket.NewPreparedMessage failed :", err)
+			return false
+		}
+
 		ws.sendMsgChan <- send_msg_queue_elem{
-			to:  conn,
-			mt:  websocket.TextMessage,
-			msg: ds,
+			to:   conn,
+			pmsg: pmsg,
 		}
 
 		return true