diff --git a/cmake/Modules/CocosBuildSet.cmake b/cmake/Modules/CocosBuildSet.cmake
index f93621238af9..a78100e125f6 100644
--- a/cmake/Modules/CocosBuildSet.cmake
+++ b/cmake/Modules/CocosBuildSet.cmake
@@ -22,8 +22,7 @@ message(STATUS "CMAKE_MODULE_PATH:" ${CMAKE_MODULE_PATH})
 message(STATUS "PROJECT_BINARY_DIR:" ${PROJECT_BINARY_DIR})
 message(STATUS "ENGINE_BINARY_PATH:" ${ENGINE_BINARY_PATH})
 
-# the default behavior of build module
-option(DEBUG_MODE "Debug or Release?" ON)
+
 option(BUILD_LUA_LIBS "Build lua libraries" OFF)
 option(BUILD_JS_LIBS "Build js libraries" OFF)
 
diff --git a/cmake/Modules/CocosConfigDefine.cmake b/cmake/Modules/CocosConfigDefine.cmake
index 45250835d27f..024ed3be5158 100644
--- a/cmake/Modules/CocosConfigDefine.cmake
+++ b/cmake/Modules/CocosConfigDefine.cmake
@@ -40,20 +40,6 @@ elseif(CMAKE_GENERATOR MATCHES Visual)
 endif()
 message(STATUS "CMAKE_GENERATOR: ${CMAKE_GENERATOR}")
 
-if(CMAKE_CONFIGURATION_TYPES)
-    set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Reset the configurations to what we need" FORCE)
-    message(STATUS "CMAKE_CONFIGURATION_TYPES: ${CMAKE_CONFIGURATION_TYPES}")
-else()
-    if(NOT CMAKE_BUILD_TYPE)
-        if(DEBUG_MODE) # build mode, Debug is default value
-            set(CMAKE_BUILD_TYPE Debug)
-        else()
-            set(CMAKE_BUILD_TYPE Release)
-        endif()
-    endif()
-    message(STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
-endif()
-
 # custom target property for lua/js link
 define_property(TARGET
     PROPERTY CC_JS_DEPEND
diff --git a/cocos/base/CCDirector.cpp b/cocos/base/CCDirector.cpp
index 1e80993ab8ed..c1407a7e41d6 100644
--- a/cocos/base/CCDirector.cpp
+++ b/cocos/base/CCDirector.cpp
@@ -747,8 +747,8 @@ static void GLToClipTransform(Mat4 *transformOut)
     Director* director = Director::getInstance();
     CCASSERT(nullptr != director, "Director is null when setting matrix stack");
 
-    auto projection = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
-    auto modelview = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
+    const auto& projection = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
+    const auto& modelview = director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
     *transformOut = projection * modelview;
 }