From 7b671dbd90d21f5c46f317e65885ce48447fea91 Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Wed, 17 Sep 2025 20:14:33 +0300
Subject: [PATCH] added benchmark submodule

---
 .gitmodules                 |  5 ++++-
 CMakeLists.txt              |  5 ++++-
 benchmark/CMakeLists.txt    | 15 +++++----------
 benchmark/benchmark_mat.cpp | 27 ++++++++++++---------------
 extlibs/CMakeLists.txt      |  3 ++-
 extlibs/benchmark           |  1 +
 6 files changed, 28 insertions(+), 28 deletions(-)
 create mode 160000 extlibs/benchmark

diff --git a/.gitmodules b/.gitmodules
index c158edf..87b94fb 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "extlibs/googletest"]
 	path = extlibs/googletest
-	url = https://github.com/google/googletest.git
\ No newline at end of file
+	url = https://github.com/google/googletest.git
+[submodule "extlibs/benchmark"]
+	path = extlibs/benchmark
+	url = https://github.com/google/benchmark.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e1ec2f..9d01bbe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,7 @@ option(OMATH_ENABLE_LEGACY "Will enable legacy classes that MUST be used ONLY fo
 message(STATUS "[${PROJECT_NAME}]: Building on ${CMAKE_HOST_SYSTEM_NAME}")
 message(STATUS "[${PROJECT_NAME}]: Warnings as errors ${OMATH_THREAT_WARNING_AS_ERROR}")
 message(STATUS "[${PROJECT_NAME}]: Build unit tests ${OMATH_BUILD_TESTS}")
+message(STATUS "[${PROJECT_NAME}]: Build benchmark ${OMATH_BUILD_BENCHMARK}")
 message(STATUS "[${PROJECT_NAME}]: As dynamic library ${OMATH_BUILD_AS_SHARED_LIBRARY}")
 message(STATUS "[${PROJECT_NAME}]: Static C++ runtime ${OMATH_STATIC_MSVC_RUNTIME_LIBRARY}")
 message(STATUS "[${PROJECT_NAME}]: CMake unity build ${OMATH_USE_UNITY_BUILD}")
@@ -97,9 +98,11 @@ endif ()
 
 target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_23)
 
+if (OMATH_BUILD_TESTS OR OMATH_BUILD_BENCHMARK)
+    add_subdirectory(extlibs)
+endif ()
 
 if (OMATH_BUILD_TESTS)
-    add_subdirectory(extlibs)
     add_subdirectory(tests)
     target_compile_definitions(${PROJECT_NAME} PUBLIC OMATH_BUILD_TESTS)
 endif ()
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index 8fd0f6d..7a558a4 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -1,13 +1,10 @@
-enable_testing()
+project(omath_benchmark)
 
-project(benchmark)
 
-include(GoogleTest)
+file(GLOB_RECURSE OMATH_BENCHMARK_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp")
+add_executable(${PROJECT_NAME} ${OMATH_BENCHMARK_SOURCES})
 
-file(GLOB_RECURSE UNIT_TESTS_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/*.cpp")
-add_executable(${PROJECT_NAME} ${UNIT_TESTS_SOURCES})
-
-set_target_properties(benchmark PROPERTIES
+set_target_properties(${PROJECT_NAME} PROPERTIES
         ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
         LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
         RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/out/${CMAKE_BUILD_TYPE}"
@@ -17,6 +14,4 @@ set_target_properties(benchmark PROPERTIES
         CXX_STANDARD_REQUIRED ON)
 
 
-target_link_libraries(${PROJECT_NAME} PRIVATE gtest gtest_main omath::omath)
-
-gtest_discover_tests(${PROJECT_NAME})
\ No newline at end of file
+target_link_libraries(${PROJECT_NAME} PRIVATE benchmark::benchmark omath)
\ No newline at end of file
diff --git a/benchmark/benchmark_mat.cpp b/benchmark/benchmark_mat.cpp
index dc23f56..fa4538c 100644
--- a/benchmark/benchmark_mat.cpp
+++ b/benchmark/benchmark_mat.cpp
@@ -1,31 +1,28 @@
 //
 // Created by Vlad on 9/17/2025.
 //
-#include <gtest/gtest.h>
+#include <benchmark/benchmark.h>
+
 #include <omath/omath.hpp>
 #include <chrono>
 #include <print>
 
 using namespace omath;
-TEST(MatPerformanceTest, Mutl)
+
+static void BM_MatMutiplication(benchmark::State& state)
 {
     using mat_type = Mat<128, 128, float, MatStoreType::COLUMN_MAJOR>;
     mat_type a;
     mat_type b;
     a.set(3.f);
     b.set(7.f);
-    constexpr int iters = 1000;
-    float acum_time = 0.f;
-    mat_type c;
-    for (std::size_t i = 0 ; i < iters; i++)
+
+
+    for (auto _ : state)
     {
-        const auto start = std::chrono::high_resolution_clock::now();
-        c = a * b;
-        const auto end = std::chrono::high_resolution_clock::now();
-
-        const auto time = std::chrono::duration_cast<std::chrono::microseconds>(end - start).count();
-
-        acum_time += static_cast<float>(time);
+        std::ignore = a * b;
     }
-    std::print("Elapsed: {}, \n\n\n", acum_time / iters, c);
-}
\ No newline at end of file
+}
+
+BENCHMARK(BM_MatMutiplication);
+BENCHMARK_MAIN();
\ No newline at end of file
diff --git a/extlibs/CMakeLists.txt b/extlibs/CMakeLists.txt
index bf73c7a..54eda0a 100644
--- a/extlibs/CMakeLists.txt
+++ b/extlibs/CMakeLists.txt
@@ -1 +1,2 @@
-add_subdirectory(googletest)
\ No newline at end of file
+add_subdirectory(googletest)
+add_subdirectory(benchmark)
\ No newline at end of file
diff --git a/extlibs/benchmark b/extlibs/benchmark
new file mode 160000
index 0000000..2948b6a
--- /dev/null
+++ b/extlibs/benchmark
@@ -0,0 +1 @@
+Subproject commit 2948b6a2e61ccabecc952c24794c6960d86c9ed6