CMake: add "performance" category

diff --git a/tests/performance/CMakeLists.txt b/tests/performance/CMakeLists.txt
new file mode 100644 (file)
index 0000000..0305d27
--- /dev/null
+++ b/tests/performance/CMakeLists.txt
@@ -0,0 +1,4 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
+INCLUDE(../setup_testsubproject.cmake)
+PROJECT(testsuite CXX)
+DEAL_II_PICKUP_TESTS()