diff --git a/client.go b/client.go
index 03e3342..9a99c8b 100644
--- a/client.go
+++ b/client.go
@@ -223,6 +223,7 @@ func (p *Client) AcceptTcpConn(conn *net.TCPConn) {
 
 	for {
 		now := time.Now()
+		sleep := true
 
 		left := common.MinOfInt(clientConn.fm.GetSendBufferLeft(), len(bytes))
 		if left > 0 {
@@ -237,6 +238,7 @@ func (p *Client) AcceptTcpConn(conn *net.TCPConn) {
 				}
 			}
 			if n > 0 {
+				sleep = false
 				clientConn.fm.WriteSendBuffer(bytes[:n])
 				tcpActiveRecvTime = now
 			}
@@ -246,6 +248,7 @@ func (p *Client) AcceptTcpConn(conn *net.TCPConn) {
 
 		sendlist := clientConn.fm.getSendList()
 		if sendlist.Len() > 0 {
+			sleep = false
 			clientConn.activeSendTime = now
 			for e := sendlist.Front(); e != nil; e = e.Next() {
 				f := e.Value.(*Frame)
@@ -265,6 +268,7 @@ func (p *Client) AcceptTcpConn(conn *net.TCPConn) {
 		}
 
 		if clientConn.fm.GetRecvBufferSize() > 0 {
+			sleep = false
 			rr := clientConn.fm.GetRecvReadLineBuffer()
 			conn.SetWriteDeadline(time.Now().Add(time.Millisecond * 1))
 			n, err := conn.Write(rr)
@@ -282,6 +286,10 @@ func (p *Client) AcceptTcpConn(conn *net.TCPConn) {
 			}
 		}
 
+		if sleep {
+			time.Sleep(time.Millisecond * 1)
+		}
+
 		diffrecv := now.Sub(clientConn.activeRecvTime)
 		diffsend := now.Sub(clientConn.activeSendTime)
 		tcpdiffrecv := now.Sub(tcpActiveRecvTime)
diff --git a/server.go b/server.go
index badf6b5..abdc002 100644
--- a/server.go
+++ b/server.go
@@ -189,6 +189,7 @@ func (p *Server) RecvTCP(conn *ServerConn, id string, src *net.IPAddr) {
 
 	for {
 		now := time.Now()
+		sleep := true
 
 		left := common.MinOfInt(conn.fm.GetSendBufferLeft(), len(bytes))
 		if left > 0 {
@@ -203,6 +204,7 @@ func (p *Server) RecvTCP(conn *ServerConn, id string, src *net.IPAddr) {
 				}
 			}
 			if n > 0 {
+				sleep = false
 				conn.fm.WriteSendBuffer(bytes[:n])
 				tcpActiveRecvTime = now
 			}
@@ -212,6 +214,7 @@ func (p *Server) RecvTCP(conn *ServerConn, id string, src *net.IPAddr) {
 
 		sendlist := conn.fm.getSendList()
 		if sendlist.Len() > 0 {
+			sleep = false
 			conn.activeSendTime = now
 			for e := sendlist.Front(); e != nil; e = e.Next() {
 				f := e.Value.(*Frame)
@@ -230,6 +233,7 @@ func (p *Server) RecvTCP(conn *ServerConn, id string, src *net.IPAddr) {
 		}
 
 		if conn.fm.GetRecvBufferSize() > 0 {
+			sleep = false
 			rr := conn.fm.GetRecvReadLineBuffer()
 			conn.tcpconn.SetWriteDeadline(time.Now().Add(time.Millisecond * 1))
 			n, err := conn.tcpconn.Write(rr)
@@ -247,6 +251,10 @@ func (p *Server) RecvTCP(conn *ServerConn, id string, src *net.IPAddr) {
 			}
 		}
 
+		if sleep {
+			time.Sleep(time.Millisecond * 1)
+		}
+
 		diffrecv := now.Sub(conn.activeRecvTime)
 		diffsend := now.Sub(conn.activeSendTime)
 		tcpdiffrecv := now.Sub(tcpActiveRecvTime)