use goroutine for reap handling

server/client.go

@@ -64,7 +64,7 @@ type client struct {
 
 	lastLogID uint64
 
-	reqErr chan error
+	// reqErr chan error
 
 	buf bytes.Buffer
 
@@ -82,7 +82,7 @@ func newClient(app *App) *client {
 	c.ldb = app.ldb
 	c.db, _ = app.ldb.Select(0) //use default db
 
-	c.reqErr = make(chan error)
+	// c.reqErr = make(chan error)
 
 	return c
 }

server/client_resp.go

@@ -77,26 +77,31 @@ func (c *respClient) run() {
 		c.app.removeSlave(c.client, handleQuit)
 	}()
 
-	// done := make(chan error)
+	done := make(chan error)
 	for {
-		// go func() {
+		// I still don't know why use goroutine can improve performance
+		// if someone knows and benchamrks with another different result without goroutine, please tell me
+		go func() {
 			reqData, err := c.readRequest()
-		if err != nil {
+			if err == nil {
-			// done <- err
+				c.handleRequest(reqData)
-			return
 			}
 
-		c.handleRequest(reqData)
+			done <- nil
-		// done <- nil
+		}()
-		// }()
 
-		// err := <-done
+		// reqData, err := c.readRequest()
-		// if err != nil {
+		// if err == nil {
-		// 	return
+		// 	c.handleRequest(reqData)
-		// }
-		// if c.conn == nil {
-		// 	return
 		// }
+
+		err := <-done
+		if err != nil {
+			return
+		}
+		if c.conn == nil {
+			return
+		}
 	}
 }