diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20c3048..dbb60f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,8 +13,11 @@
 - support websocket as the transport like tcp,kcp and quic
 - add CMuxPlugin to allow developing customzied services by using the same single port
 - re-tag rpcx to make sure the version is less than 2 (for go module)
-- support visit grpc services by rpcx clients
+- support visit grpc services by rpcx clients: https://github.com/rpcxio/rpcxplus/tree/master/grpcx
 - support configing grpc servicves in rpcx server side
+- improve rpcx performance
+- add Inform method in XClient
+- add memory connection for unit tests
 
 ## 1.6.0 
 
diff --git a/client/connection.go b/client/connection.go
index 8727c33..cfe989e 100644
--- a/client/connection.go
+++ b/client/connection.go
@@ -22,6 +22,7 @@ var ConnFactories = map[string]ConnFactoryFn{
 	"kcp":  newDirectKCPConn,
 	"quic": newDirectQuicConn,
 	"unix": newDirectConn,
+	"memu": newMemuConn,
 }
 
 // Connect connects the server via specified network.
@@ -34,12 +35,6 @@ func (c *Client) Connect(network, address string) error {
 		conn, err = newDirectHTTPConn(c, network, address)
 	case "ws", "wss":
 		conn, err = newDirectWSConn(c, network, address)
-	case "kcp":
-		conn, err = newDirectKCPConn(c, network, address)
-	case "quic":
-		conn, err = newDirectQuicConn(c, network, address)
-	case "unix":
-		conn, err = newDirectConn(c, network, address)
 	default:
 		fn := ConnFactories[network]
 		if fn != nil {
diff --git a/client/connection_memu.go b/client/connection_memu.go
new file mode 100644
index 0000000..5985be1
--- /dev/null
+++ b/client/connection_memu.go
@@ -0,0 +1,11 @@
+package client
+
+import (
+	"net"
+
+	"github.com/akutz/memconn"
+)
+
+func newMemuConn(c *Client, network, address string) (net.Conn, error) {
+	return memconn.Dial(network, address)
+}
diff --git a/go.mod b/go.mod
index 1e0ecf2..2ea9d9d 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,7 @@ go 1.16
 
 require (
 	github.com/ChimeraCoder/gojson v1.1.0
+	github.com/akutz/memconn v0.1.0 // indirect
 	github.com/apache/thrift v0.14.0
 	github.com/cenk/backoff v2.2.1+incompatible // indirect
 	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
diff --git a/go.sum b/go.sum
index 0b958f7..5b87ead 100644
--- a/go.sum
+++ b/go.sum
@@ -11,6 +11,8 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/ChimeraCoder/gojson v1.1.0 h1:/6S8djl/jColpJGTYniA3xrqJWuKeyEozzPtpr5L4Pw=
 github.com/ChimeraCoder/gojson v1.1.0/go.mod h1:nYbTQlu6hv8PETM15J927yM0zGj3njIldp72UT1MqSw=
 github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
+github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A=
+github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw=
 github.com/alangpierce/go-forceexport v0.0.0-20160317203124-8f1d6941cd75/go.mod h1:uAXEEpARkRhCZfEvy/y0Jcc888f9tHCc1W7/UeEtreE=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
diff --git a/server/memconn.go b/server/memconn.go
new file mode 100644
index 0000000..bdf754f
--- /dev/null
+++ b/server/memconn.go
@@ -0,0 +1,15 @@
+package server
+
+import (
+	"net"
+
+	"github.com/akutz/memconn"
+)
+
+func init() {
+	makeListeners["memconn"] = memconnMakeListener
+}
+
+func memconnMakeListener(s *Server, address string) (ln net.Listener, err error) {
+	return memconn.Listen("memu", address)
+}