[Bf-blender-cvs] [61f9b3e991c] temp-lib-google-benchmark: First benchmark test.

[Jeroen Bakker]

Commit: 61f9b3e991cb56b60cad89841c25d4d937e8c86e
Author: Jeroen Bakker
Date:   Wed May 26 12:12:52 2021 +0200
Branches: temp-lib-google-benchmark
https://developer.blender.org/rB61f9b3e991cb56b60cad89841c25d4d937e8c86e

First benchmark test.

===================================================================

M	CMakeLists.txt
M	extern/CMakeLists.txt
M	tests/CMakeLists.txt
A	tests/gbenchmark/CMakeLists.txt
A	tests/gbenchmark/gbenchmark_test.cc

===================================================================

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f315fa87236..4ac9abf2246 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -472,6 +472,7 @@ endif()
 
 # Unit testsing
 option(WITH_GTESTS "Enable GTest unit testing" OFF)
+option(WITH_BENCHMARK_TESTS "Enable Benchmark unit tests" OFF)
 option(WITH_OPENGL_RENDER_TESTS "Enable OpenGL render related unit testing (Experimental)" OFF)
 option(WITH_OPENGL_DRAW_TESTS "Enable OpenGL UI drawing related unit testing (Experimental)" OFF)
 set(TEST_PYTHON_EXE "" CACHE PATH "Python executable to run unit tests")
diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index 824b2fb0e9c..b5d59e01b0b 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -92,6 +92,10 @@ if(WITH_GTESTS)
   add_subdirectory(gmock)
 endif()
 
+if (WITH_BENCHMARK_TESTS)
+  add_subdirectory(gbenchmark)
+endif()
+
 if(WITH_SDL AND WITH_SDL_DYNLOAD)
   add_subdirectory(sdlew)
 endif()
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 3d9201bec04..6ba8f6f3b16 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -58,3 +58,6 @@ endif()
 
 # GTest
 add_subdirectory(gtests)
+
+# GBenchmark
+add_subdirectory(gbenchmark)
diff --git a/tests/gbenchmark/CMakeLists.txt b/tests/gbenchmark/CMakeLists.txt
new file mode 100644
index 00000000000..1670e9af7e6
--- /dev/null
+++ b/tests/gbenchmark/CMakeLists.txt
@@ -0,0 +1,20 @@
+if(WITH_BENCHMARK_TESTS)
+    set(INC
+    .
+    ../../extern/gbenchmark/include/
+    )
+
+    set(INC_SYS
+
+    )
+
+    set(SRC
+        gbenchmark_test.cc
+    )
+
+    set(LIB
+        extern_gbenchmark
+    )
+
+    blender_add_test_executable(benchmark "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
+endif()
diff --git a/tests/gbenchmark/gbenchmark_test.cc b/tests/gbenchmark/gbenchmark_test.cc
new file mode 100644
index 00000000000..9884d9611f7
--- /dev/null
+++ b/tests/gbenchmark/gbenchmark_test.cc
@@ -0,0 +1,18 @@
+#include <benchmark/benchmark.h>
+
+static void BM_StringCreation(benchmark::State &state)
+{
+  for (auto _ : state)
+    std::string empty_string;
+}
+// Register the function as a benchmark
+BENCHMARK(BM_StringCreation);
+
+// Define another benchmark
+static void BM_StringCopy(benchmark::State &state)
+{
+  std::string x = "hello";
+  for (auto _ : state)
+    std::string copy(x);
+}
+BENCHMARK(BM_StringCopy);