diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 4ed1403f1..274cbd7a6 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -3,6 +3,10 @@ option(GLM_QUIET "No CMake Message" OFF)
 option(GLM_TEST_ENABLE "Build unit tests" ON)
 option(GLM_PERF_TEST_ENABLE "Build perf tests" OFF)
 
+if(GLM_PERF_TEST_ENABLE)
+	add_definitions(-DGLM_TEST_PERF)
+endif()
+
 # Compiler and default options
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
diff --git a/test/gtc/gtc_bitfield.cpp b/test/gtc/gtc_bitfield.cpp
index d571356dd..d73e95748 100644
--- a/test/gtc/gtc_bitfield.cpp
+++ b/test/gtc/gtc_bitfield.cpp
@@ -1021,9 +1021,10 @@ int main()
 {
 	int Error = 0;
 
-	std::clock_t const LastTime = std::clock();
-
 	Error += ::bitfieldInterleave::test();
+
+#ifdef GLM_TEST_PERF
+
 	Error += ::bitfieldInterleave3::test();
 	Error += ::bitfieldInterleave4::test();
 
@@ -1033,15 +1034,18 @@ int main()
 
 	Error += ::bitfieldInterleave::perf();
 
+#endif//GLM_TEST_PERF
+
 	Error += ::mask::test();
+
+#ifdef GLM_TEST_PERF
+
 	Error += ::mask::perf();
 
+#endif//GLM_TEST_PERF
+
 	Error += test_bitfieldRotateRight();
 	Error += test_bitfieldRotateLeft();
 
-	std::clock_t const Time = std::clock() - LastTime;
-
-	std::printf("gtc_bitfield %d clocks\n", static_cast<int>(Time));
-
 	return Error;
 }