diff --git a/.gitmodules b/.gitmodules
index b0b35e4..6feceff 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,9 @@
 [submodule "develop/vendors/fmt"]
 	path = develop/vendors/fmt
 	url = https://github.com/fmtlib/fmt
+[submodule "develop/vendors/gbench"]
+	path = develop/vendors/gbench
+	url = https://github.com/google/benchmark
+[submodule "develop/vendors/vmath.hpp"]
+	path = develop/vendors/vmath.hpp
+	url = https://github.com/BlackMATov/vmath.hpp
diff --git a/develop/CMakeLists.txt b/develop/CMakeLists.txt
index 83b1241..162f558 100644
--- a/develop/CMakeLists.txt
+++ b/develop/CMakeLists.txt
@@ -16,6 +16,7 @@ include(SetupTargets)
 
 add_subdirectory(manuals)
 add_subdirectory(singles)
+add_subdirectory(unbench)
 add_subdirectory(untests)
 add_subdirectory(vendors)
 
diff --git a/develop/cmake/SetupTargets.cmake b/develop/cmake/SetupTargets.cmake
index c1ae755..2effad2 100644
--- a/develop/cmake/SetupTargets.cmake
+++ b/develop/cmake/SetupTargets.cmake
@@ -1,10 +1,6 @@
 add_library(${PROJECT_NAME}.setup_targets INTERFACE)
 add_library(${PROJECT_NAME}::setup_targets ALIAS ${PROJECT_NAME}.setup_targets)
 
-target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
-    meta.hpp.vendors::doctest
-    meta.hpp.vendors::fmt)
-
 target_compile_options(${PROJECT_NAME}.setup_targets INTERFACE
     $<$<CXX_COMPILER_ID:MSVC>:
         /WX /W4>
@@ -15,6 +11,7 @@ target_compile_options(${PROJECT_NAME}.setup_targets INTERFACE
         -Wno-c++98-compat
         -Wno-c++98-compat-pedantic
         -Wno-exit-time-destructors
+        -Wno-global-constructors
         -Wno-padded
         -Wno-unneeded-internal-declaration
         -Wno-unused-macros
@@ -23,26 +20,13 @@ target_compile_options(${PROJECT_NAME}.setup_targets INTERFACE
         -Wno-zero-as-null-pointer-constant
         >)
 
-if(BUILD_WITH_COVERAGE)
-    target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
-        meta.hpp::enable_gcov)
-endif()
-
-if(BUILD_WITH_SANITIZERS)
-    target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
+target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
+    $<$<BOOL:${BUILD_WITH_COVERAGE}>:
+        meta.hpp::enable_gcov>
+    $<$<BOOL:${BUILD_WITH_SANITIZERS}>:
         meta.hpp::enable_asan
-        meta.hpp::enable_ubsan)
-endif()
-
-if(BUILD_WITH_NO_EXCEPTIONS)
-    target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
-        meta.hpp::disable_exceptions)
-
-    target_compile_definitions(${PROJECT_NAME}.setup_targets INTERFACE
-        DOCTEST_CONFIG_NO_EXCEPTIONS_BUT_WITH_ALL_ASSERTS)
-endif()
-
-if(BUILD_WITH_NO_RTTI)
-    target_link_libraries(${PROJECT_NAME}.setup_targets INTERFACE
-        meta.hpp::disable_rtti)
-endif()
+        meta.hpp::enable_ubsan>
+    $<$<BOOL:${BUILD_WITH_NO_EXCEPTIONS}>:
+        meta.hpp::disable_exceptions>
+    $<$<BOOL:${BUILD_WITH_NO_RTTI}>:
+        meta.hpp::disable_rtti>)
diff --git a/develop/manuals/CMakeLists.txt b/develop/manuals/CMakeLists.txt
index 92706b0..861c994 100644
--- a/develop/manuals/CMakeLists.txt
+++ b/develop/manuals/CMakeLists.txt
@@ -8,11 +8,15 @@ add_executable(${PROJECT_NAME}.singles ${MANUALS_SOURCES})
 
 target_link_libraries(${PROJECT_NAME} PRIVATE
     meta.hpp::meta.hpp
-    meta.hpp::setup_targets)
+    meta.hpp::setup_targets
+    meta.hpp.vendors::doctest
+    meta.hpp.vendors::fmt)
 
 target_link_libraries(${PROJECT_NAME}.singles PRIVATE
     meta.hpp::singles
-    meta.hpp::setup_targets)
+    meta.hpp::setup_targets
+    meta.hpp.vendors::doctest
+    meta.hpp.vendors::fmt)
 
 add_test(${PROJECT_NAME} ${PROJECT_NAME})
 add_test(${PROJECT_NAME} ${PROJECT_NAME}.singles)
diff --git a/develop/unbench/CMakeLists.txt b/develop/unbench/CMakeLists.txt
new file mode 100644
index 0000000..4661203
--- /dev/null
+++ b/develop/unbench/CMakeLists.txt
@@ -0,0 +1,22 @@
+project(meta.hpp.unbench)
+
+file(GLOB_RECURSE UNBENCH_SOURCES CONFIGURE_DEPENDS "*.cpp" "*.hpp")
+source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${UNBENCH_SOURCES})
+
+add_executable(${PROJECT_NAME} ${UNBENCH_SOURCES})
+add_executable(${PROJECT_NAME}.singles ${UNBENCH_SOURCES})
+
+target_link_libraries(${PROJECT_NAME} PRIVATE
+    meta.hpp::meta.hpp
+    meta.hpp::setup_targets
+    meta.hpp.vendors::gbench
+    meta.hpp.vendors::vmath.hpp)
+
+target_link_libraries(${PROJECT_NAME}.singles PRIVATE
+    meta.hpp::singles
+    meta.hpp::setup_targets
+    meta.hpp.vendors::gbench
+    meta.hpp.vendors::vmath.hpp)
+
+add_test(${PROJECT_NAME} ${PROJECT_NAME})
+add_test(${PROJECT_NAME} ${PROJECT_NAME}.singles)
diff --git a/develop/unbench/invoke_with_args_bench.cpp b/develop/unbench/invoke_with_args_bench.cpp
new file mode 100644
index 0000000..222a91e
--- /dev/null
+++ b/develop/unbench/invoke_with_args_bench.cpp
@@ -0,0 +1,61 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/meta.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include <meta.hpp/meta_all.hpp>
+
+#include <benchmark/benchmark.h>
+#include <vmath.hpp/vmath_all.hpp>
+
+namespace
+{
+    namespace meta = meta_hpp;
+    namespace vmath = vmath_hpp;
+
+    struct clazz {
+        static float static_function(float angle, const vmath::fvec3& axis) {
+            return vmath::determinant(vmath::inverse(vmath::rotate4(angle, axis)));
+        }
+    };
+
+    const float angle{0.2f};
+    const meta::uvalue angle_v{angle};
+
+    const vmath::fvec3 axis{1.f, 0.f, 0.f};
+    const meta::uvalue axis_v{axis};
+
+    const meta::function dynamic_function{[](){
+        meta::class_<clazz>().function_("static_function", &clazz::static_function);
+        return meta::resolve_type<clazz>().get_function("static_function");
+    }()};
+
+    void invoke_with_args_native(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{clazz::static_function(angle, axis)};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+
+    void invoke_with_args_dynamic1(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{meta::invoke(&clazz::static_function, angle, axis)};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+
+    void invoke_with_args_dynamic2(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{meta::invoke(dynamic_function, angle_v, axis_v)};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+}
+
+BENCHMARK(invoke_with_args_native);
+BENCHMARK(invoke_with_args_dynamic1);
+BENCHMARK(invoke_with_args_dynamic2);
diff --git a/develop/unbench/invoke_without_args_bench.cpp b/develop/unbench/invoke_without_args_bench.cpp
new file mode 100644
index 0000000..b848420
--- /dev/null
+++ b/develop/unbench/invoke_without_args_bench.cpp
@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/meta.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include <meta.hpp/meta_all.hpp>
+
+#include <benchmark/benchmark.h>
+#include <vmath.hpp/vmath_all.hpp>
+
+namespace
+{
+    namespace meta = meta_hpp;
+    namespace vmath = vmath_hpp;
+
+    struct clazz {
+        static float static_function() {
+            return vmath::determinant(vmath::inverse(vmath::fmat4{}));
+        }
+    };
+
+    const meta::function dynamic_function{[](){
+        meta::class_<clazz>().function_("static_function", &clazz::static_function);
+        return meta::resolve_type<clazz>().get_function("static_function");
+    }()};
+
+    void invoke_without_args_native(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{clazz::static_function()};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+
+    void invoke_without_args_dynamic1(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{meta::invoke(&clazz::static_function)};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+
+    void invoke_without_args_dynamic2(benchmark::State &state) {
+        for ( auto _ : state ) {
+            const auto r{meta::invoke(dynamic_function)};
+            benchmark::DoNotOptimize(r);
+            benchmark::ClobberMemory();
+        }
+    }
+}
+
+BENCHMARK(invoke_without_args_native);
+BENCHMARK(invoke_without_args_dynamic1);
+BENCHMARK(invoke_without_args_dynamic2);
diff --git a/develop/untests/CMakeLists.txt b/develop/untests/CMakeLists.txt
index 07de844..8396a48 100644
--- a/develop/untests/CMakeLists.txt
+++ b/develop/untests/CMakeLists.txt
@@ -8,11 +8,13 @@ add_executable(${PROJECT_NAME}.singles ${UNTESTS_SOURCES})
 
 target_link_libraries(${PROJECT_NAME} PRIVATE
     meta.hpp::meta.hpp
-    meta.hpp::setup_targets)
+    meta.hpp::setup_targets
+    meta.hpp.vendors::doctest)
 
 target_link_libraries(${PROJECT_NAME}.singles PRIVATE
     meta.hpp::singles
-    meta.hpp::setup_targets)
+    meta.hpp::setup_targets
+    meta.hpp.vendors::doctest)
 
 add_test(${PROJECT_NAME} ${PROJECT_NAME})
 add_test(${PROJECT_NAME} ${PROJECT_NAME}.singles)
diff --git a/develop/vendors/CMakeLists.txt b/develop/vendors/CMakeLists.txt
index df35475..b9a2f12 100644
--- a/develop/vendors/CMakeLists.txt
+++ b/develop/vendors/CMakeLists.txt
@@ -14,8 +14,12 @@ target_include_directories(${PROJECT_NAME}.doctest SYSTEM
     PUBLIC doctest)
 
 target_compile_definitions(${PROJECT_NAME}.doctest
-    PRIVATE DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
-    INTERFACE DOCTEST_CONFIG_USE_STD_HEADERS)
+    PRIVATE
+        DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
+    PUBLIC
+        DOCTEST_CONFIG_USE_STD_HEADERS
+        $<$<BOOL:${BUILD_WITH_NO_EXCEPTIONS}>:
+            DOCTEST_CONFIG_NO_EXCEPTIONS_BUT_WITH_ALL_ASSERTS>)
 
 #
 # fmt
@@ -32,3 +36,33 @@ target_include_directories(${PROJECT_NAME}.fmt SYSTEM
 
 target_compile_definitions(${PROJECT_NAME}.fmt
     INTERFACE FMT_HEADER_ONLY)
+
+#
+# gbench
+#
+
+file(GLOB_RECURSE GBENCH_SOURCES CONFIGURE_DEPENDS "gbench/src/*.cc")
+add_library(${PROJECT_NAME}.gbench STATIC ${GBENCH_SOURCES})
+add_library(${PROJECT_NAME}::gbench ALIAS ${PROJECT_NAME}.gbench)
+
+target_compile_features(${PROJECT_NAME}.gbench
+    PUBLIC cxx_std_20)
+
+target_include_directories(${PROJECT_NAME}.gbench SYSTEM
+    PUBLIC gbench/include)
+
+target_compile_definitions(${PROJECT_NAME}.gbench
+    PUBLIC BENCHMARK_STATIC_DEFINE)
+
+#
+# vmath
+#
+
+add_library(${PROJECT_NAME}.vmath.hpp INTERFACE)
+add_library(${PROJECT_NAME}::vmath.hpp ALIAS ${PROJECT_NAME}.vmath.hpp)
+
+target_compile_features(${PROJECT_NAME}.vmath.hpp
+    INTERFACE cxx_std_20)
+
+target_include_directories(${PROJECT_NAME}.vmath.hpp SYSTEM
+    INTERFACE vmath.hpp/headers)
diff --git a/develop/vendors/gbench b/develop/vendors/gbench
new file mode 160000
index 0000000..d572f47
--- /dev/null
+++ b/develop/vendors/gbench
@@ -0,0 +1 @@
+Subproject commit d572f4777349d43653b21d6c2fc63020ab326db2
diff --git a/develop/vendors/vmath.hpp b/develop/vendors/vmath.hpp
new file mode 160000
index 0000000..4699938
--- /dev/null
+++ b/develop/vendors/vmath.hpp
@@ -0,0 +1 @@
+Subproject commit 4699938160c90ae5539b3b1a26dbeaef0bf0ab0c