diff --git a/nbhttp/websocket/conn.go b/nbhttp/websocket/conn.go
index 96b6544b..9a7b8232 100644
--- a/nbhttp/websocket/conn.go
+++ b/nbhttp/websocket/conn.go
@@ -140,14 +140,18 @@ func (c *Conn) CompressionEnabled() bool {
 	return c.compress
 }
 
-func (c *Conn) handleDataFrame(opcode MessageType, fin bool, data []byte) {
+func (c *Conn) handleDataFrame(opcode MessageType, fin bool, body []byte) {
 	h := c.dataFrameHandler
 	if c.isBlockingMod {
-		h(c, opcode, fin, data)
+		h(c, opcode, fin, body)
 	} else {
-		c.Execute(func() {
-			h(c, opcode, fin, data)
-		})
+		if !c.Execute(func() {
+			h(c, opcode, fin, body)
+		}) {
+			if len(body) > 0 {
+				c.Engine.BodyAllocator.Free(body)
+			}
+		}
 	}
 }
 
@@ -343,6 +347,7 @@ func (c *Conn) Parse(data []byte) error {
 	var err error
 	var body []byte
 	var frame []byte
+	var message []byte
 	var protocolMessage []byte
 	var opcode MessageType
 	var ok, fin, compress bool
@@ -367,7 +372,7 @@ func (c *Conn) Parse(data []byte) error {
 				bl := len(body)
 				if c.dataFrameHandler != nil {
 					if bl > 0 {
-						frame = c.Engine.BodyAllocator.Malloc(bl)
+						frame = allocator.Malloc(bl)
 						copy(frame, body)
 					}
 					if c.msgType == TextMessage && len(frame) > 0 && !c.Engine.CheckUtf8(frame) {
@@ -379,16 +384,20 @@ func (c *Conn) Parse(data []byte) error {
 				if c.messageHandler != nil {
 					if bl > 0 {
 						if c.message == nil {
-							c.message = c.Engine.BodyAllocator.Malloc(len(body))
+							c.message = allocator.Malloc(len(body))
 							copy(c.message, body)
 						} else {
-							c.message = c.Engine.BodyAllocator.Append(c.message, body...)
+							c.message = allocator.Append(c.message, body...)
 						}
 					}
+					if fin {
+						message = c.message
+						c.message = nil
+					}
 				}
 			case PingMessage, PongMessage, CloseMessage:
 				if len(body) > 0 {
-					protocolMessage = c.Engine.BodyAllocator.Malloc(len(body))
+					protocolMessage = allocator.Malloc(len(body))
 					copy(protocolMessage, body)
 				}
 			default:
@@ -413,23 +422,23 @@ func (c *Conn) Parse(data []byte) error {
 							var b []byte
 							var rc io.ReadCloser
 							if c.Engine.WebsocketDecompressor != nil {
-								rc = c.Engine.WebsocketDecompressor(io.MultiReader(bytes.NewBuffer(c.message), strings.NewReader(flateReaderTail)))
+								rc = c.Engine.WebsocketDecompressor(io.MultiReader(bytes.NewBuffer(message), strings.NewReader(flateReaderTail)))
 							} else {
-								rc = decompressReader(io.MultiReader(bytes.NewBuffer(c.message), strings.NewReader(flateReaderTail)))
+								rc = decompressReader(io.MultiReader(bytes.NewBuffer(message), strings.NewReader(flateReaderTail)))
 							}
-							b, err = c.readAll(rc, len(c.message)*2)
-							c.Engine.BodyAllocator.Free(c.message)
-							c.message = b
+							b, err = c.readAll(rc, len(message)*2)
+							allocator.Free(message)
+							message = b
 							rc.Close()
 							if err != nil {
 								return err
 							}
 						}
-						c.handleMessage(c.msgType, c.message)
+						c.handleMessage(c.msgType, message)
 					}
 					c.compress = false
 					c.expectingFragments = false
-					c.message = nil
+					message = nil
 					c.msgType = 0
 				} else {
 					c.expectingFragments = true