testqbsp: experiment with adding nanobench

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "3rdparty/json"]
 	path = 3rdparty/json
 	url = https://github.com/ArthurSonzogni/nlohmann_json_cmake_fetchcontent
+[submodule "3rdparty/nanobench"]
+	path = 3rdparty/nanobench
+	url = https://github.com/martinus/nanobench

3rdparty/CMakeLists.txt

@@ -5,4 +5,5 @@ set(INSTALL_GTEST OFF CACHE BOOL "" FORCE)
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 add_subdirectory(googletest EXCLUDE_FROM_ALL)
 
-add_subdirectory(json EXCLUDE_FROM_ALL)
+add_subdirectory(json EXCLUDE_FROM_ALL)
+add_subdirectory(nanobench EXCLUDE_FROM_ALL)

3rdparty/nanobench

@@ -0,0 +1 @@
+Subproject commit 26a9c089ca54927c1658c046749ca1b8fd60422c

qbsp/CMakeLists.txt

@@ -49,7 +49,7 @@ set(QBSP_TEST_SOURCE
 	test_qbsp.cc
 	${CMAKE_BINARY_DIR}/testmaps.hh)
 add_executable(testqbsp ${QBSP_TEST_SOURCE})
-target_link_libraries (testqbsp libqbsp common ${CMAKE_THREAD_LIBS_INIT} TBB::tbb gtest gmock fmt::fmt)
+target_link_libraries (testqbsp libqbsp common ${CMAKE_THREAD_LIBS_INIT} TBB::tbb gtest gmock fmt::fmt nanobench::nanobench)
 
 include(GoogleTest)
 gtest_discover_tests(testqbsp)

qbsp/test_qbsp.cc

@@ -9,6 +9,8 @@
 #include <common/qvec.hh>
 #include <testmaps.hh>
 
+#include <nanobench.h>
+
 #include <algorithm>
 #include <cstring>
 #include <set>
@@ -836,4 +838,31 @@ TEST(testmaps_q2, base1)
     //      visdata               0
     //      entdata           53623
 #endif
-}
+}
+
+TEST(benchmark, winding) {
+    ankerl::nanobench::Bench bench;
+
+    bench.run("std::vector<double> reserve(3*4*6)", [&] {
+        std::vector<double> temp;
+        temp.reserve(3 * 4 * 6);
+        ankerl::nanobench::doNotOptimizeAway(temp);
+    });
+    bench.run("std::vector<qvec3d> reserve(4*6)", [&] {
+        std::vector<qvec3d> temp;
+        temp.reserve(4 * 6);
+        ankerl::nanobench::doNotOptimizeAway(temp);
+    });
+    bench.run("std::array<double, 3*4*6>", [&] {
+        std::array<double, 3 * 4 * 6> temp;
+        ankerl::nanobench::doNotOptimizeAway(temp);
+    });
+    bench.run("std::array<qvec3d, 4*6>", [&] {
+        std::array<qvec3d, 4 * 6> temp;
+        ankerl::nanobench::doNotOptimizeAway(temp);
+    });
+    bench.run("polylib::winding_base_t<6> construct", [&] {
+        polylib::winding_base_t<6> temp;
+        ankerl::nanobench::doNotOptimizeAway(temp);
+    });
+}