diff --git a/.gitignore b/.gitignore
index a5ccbb8..f8d45f4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 /build
 build.sh
 run.sh
+test.sh
 
 # Compiled Object files
 *.slo
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 25ae2fa..99d0731 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,5 +5,5 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
 # set(CMAKE_BUILD_TYPE Debug)
 # set(CMAKE_BUILD_TYPE Release)
-add_definitions(-DSHOW_PERF=1)
+# add_definitions(-DSHOW_PERF=1)
 add_subdirectory(src)
\ No newline at end of file
diff --git a/ext/README.md b/ext/README.md
new file mode 100644
index 0000000..17db8ee
--- /dev/null
+++ b/ext/README.md
@@ -0,0 +1 @@
+## third-party codes are placed here
\ No newline at end of file