new project structure

unbench/CMakeLists.txt

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+# 3.11 version is required for `FetchContent`
+cmake_minimum_required(VERSION 3.11 FATAL_ERROR)
+
+project(ecs.hpp.unbench)
+
+#
+# google benchmark
+#
+
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+
+include(FetchContent)
+FetchContent_Declare(
+    gbench
+    GIT_REPOSITORY https://github.com/google/benchmark)
+
+FetchContent_GetProperties(gbench)
+if(NOT gbench_POPULATED)
+    FetchContent_Populate(gbench)
+    add_subdirectory(${gbench_SOURCE_DIR} ${gbench_BINARY_DIR})
+endif()
+
+#
+# benchmark executable
+#
+
+file(GLOB UNBENCH_SOURCES "*.cpp" "*.hpp")
+add_executable(${PROJECT_NAME} ${UNBENCH_SOURCES})
+
+target_link_libraries(${PROJECT_NAME}
+    benchmark_main
+    ecs.hpp)
+
+add_test(${PROJECT_NAME} ${PROJECT_NAME})

unbench/bench_base.hpp

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+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/ecs.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include <benchmark/benchmark.h>
+
+namespace ecs_hpp_unbench
+{
+}

unbench/ecs_join_bench.cpp

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+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/ecs.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include "bench_base.hpp"
+using namespace ecs_hpp_unbench;
+
+#include "ecs.hpp"
+namespace ecs = ecs_hpp;