Improved performance

Server.go

@@ -216,7 +216,16 @@ func (s *server) handleRequest(ctx *context, method string, url string, writer i
 	tmp.WriteString(strconv.Itoa(int(ctx.status)))
 	tmp.WriteString("\r\nContent-Length: ")
 	tmp.WriteString(strconv.Itoa(len(ctx.response.body)))
-	tmp.WriteString("\r\n\r\n")
+	tmp.WriteString("\r\n")
+
+	for _, header := range ctx.response.headers {
+		tmp.WriteString(header.Key)
+		tmp.WriteString(": ")
+		tmp.WriteString(header.Value)
+		tmp.WriteString("\r\n")
+	}
+
+	tmp.WriteString("\r\n")
 	tmp.Write(ctx.response.body)
 	writer.Write(tmp.Bytes())
 }