Add benchmark. (#127)

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.11)
 
 find_package(Git QUIET)
 if (Git_FOUND AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git")
@@ -218,17 +218,7 @@ if (FTXUI_BUILD_TESTS AND ${CMAKE_VERSION} VERSION_GREATER "3.11.4")
     GIT_REPOSITORY "https://github.com/google/googletest"
     GIT_TAG        23ef29555ef4789f555f1ba8c51b4c52975f0907
   )
-
-  FetchContent_GetProperties(googletest)
-  if(NOT googletest_POPULATED)
-    message(STATUS "Fetching googletest...")
-    FetchContent_Populate(googletest)
-    message(STATUS "... done")
-    add_subdirectory(
-      ${googletest_SOURCE_DIR}
-      ${googletest_BINARY_DIR}
-      EXCLUDE_FROM_ALL)
-  endif()
+  FetchContent_MakeAvailable(googletest)
 
   add_executable(tests
     src/ftxui/component/component_test.cpp
@@ -255,9 +245,29 @@ if (FTXUI_BUILD_TESTS AND ${CMAKE_VERSION} VERSION_GREATER "3.11.4")
   )
   target_compile_options(tests PRIVATE -fsanitize=address)
   target_link_libraries(tests PRIVATE -fsanitize=address)
-
   set_property(TARGET tests PROPERTY CXX_STANDARD 17)
 
+  if (NOT MSVC)
+    FetchContent_Declare(googlebenchmark
+      GIT_REPOSITORY "https://github.com/google/benchmark"
+      GIT_TAG 62937f91b5c763a8e119d0c20c67b87bde8eff1c 
+    )
+    FetchContent_MakeAvailable(googlebenchmark)
+
+    add_executable(ftxui_benchmark
+      src/ftxui/dom/benchmark_test.cpp
+    )
+    target_link_libraries(ftxui_benchmark
+      PRIVATE dom
+      PRIVATE benchmark::benchmark
+      PRIVATE benchmark::benchmark_main
+    )
+    target_include_directories(ftxui_benchmark
+      PRIVATE src
+    )
+    set_property(TARGET ftxui_benchmark PROPERTY CXX_STANDARD 17)
+  endif()
+
   if (FTXUI_BUILD_TESTS_FUZZER)
     set(CMAKE_C_COMPILER clang)
     set(CMAKE_CXX_COMPILER clang++)

src/ftxui/component/component_test.cpp

@@ -1,8 +1,8 @@
-#include <gtest/gtest.h>  // for Test, SuiteApiResolver, TestInfo (ptr only), TEST, TestFactoryImpl
 #include <memory>  // for shared_ptr, allocator, make_shared, __shared_ptr_access
 
 #include "ftxui/component/captured_mouse.hpp"  // for ftxui
 #include "ftxui/component/component_base.hpp"  // for ComponentBase, Component
+#include "gtest/gtest_pred_impl.h"  // for Test, SuiteApiResolver, TEST, TestFactoryImpl
 
 using namespace ftxui;
 

src/ftxui/component/screen_interactive.cpp

@@ -206,7 +206,7 @@ void OnExit(int signal) {
     on_exit_functions.pop();
   }
   if (signal)
-     std::raise(signal);
+    std::raise(signal);
 }
 
 auto install_signal_handler = [](int sig, SignalHandler handler) {

src/ftxui/dom/benchmark_test.cpp

@@ -0,0 +1,35 @@
+#include <benchmark/benchmark.h>
+
+#include "ftxui/dom/elements.hpp"  // for separator, gauge, operator|, text, Element, blink, inverted, hbox, vbox, border
+#include "ftxui/dom/node.hpp"      // for Render
+#include "ftxui/screen/box.hpp"    // for ftxui
+#include "ftxui/screen/screen.hpp"  // for Screen
+
+using namespace ftxui;
+
+static void BencharkBasic(benchmark::State& state) {
+  while (state.KeepRunning()) {
+    auto document = vbox({
+                        text(L"Test"),
+                        separator(),
+                        hbox({
+                            gauge(0.9),
+                            separator() | blink,
+                            gauge(0.5),
+                            separator() | inverted,
+                            gauge(0.1),
+                            separator(),
+                        }),
+                        text(L"Test"),
+                    }) |
+                    border;
+    auto root = gauge(1.0);
+    Screen screen(80, state.range(0));
+    Render(screen, root);
+  }
+}
+BENCHMARK(BencharkBasic)->DenseRange(0, 256, 16);
+
+// Copyright 2021 Arthur Sonzogni. All rights reserved.
+// Use of this source code is governed by the MIT license that can be found in
+// the LICENSE file.l