adding actual benchmarks to the project

Author: lemire

.github/workflows/ubuntu24.yml

@@ -11,7 +11,7 @@ jobs:
         run: |
           mkdir build &&
           cd build &&
-          CXXFLAGS=-Werror cmake -DFASTFLOAT_TEST=ON  ..  &&
+          CXXFLAGS=-Werror cmake -DFASTFLOAT_TEST=ON -D FASTFLOAT_BENCHMARKS=ON ..  &&
           cmake --build .   &&
           ctest --output-on-failure
       - name: Use cmake CXX23

CMakeLists.txt

@@ -4,6 +4,7 @@ project(fast_float VERSION 7.0.0 LANGUAGES CXX)
 set(FASTFLOAT_CXX_STANDARD 11 CACHE STRING "the C++ standard to use for fastfloat")
 set(CMAKE_CXX_STANDARD ${FASTFLOAT_CXX_STANDARD})
 option(FASTFLOAT_TEST "Enable tests" OFF)
+
 if(FASTFLOAT_TEST)
   enable_testing()
   add_subdirectory(tests)
@@ -29,6 +30,16 @@ if(FASTFLOAT_INSTALL)
 endif()
 
 add_library(fast_float INTERFACE)
+
+
+option(FASTFLOAT_BENCHMARKS "Enable benchmarks" OFF)
+if(FASTFLOAT_BENCHMARKS)
+  add_subdirectory(benchmarks)
+else(FASTFLOAT_BENCHMARKS)
+  message(STATUS "Benchmarks are disabled. Set FASTFLOAT_BENCHMARKS to ON to build benchmarks (assumes C++17).")
+endif(FASTFLOAT_BENCHMARKS)
+
+
 add_library(FastFloat::fast_float ALIAS fast_float)
 target_include_directories(
   fast_float

benchmarks/CMakeLists.txt

@@ -0,0 +1,26 @@
+add_executable(realbenchmark benchmark.cpp)
+set_property(
+    TARGET realbenchmark
+    PROPERTY CXX_STANDARD 17)
+
+target_link_libraries(realbenchmark PUBLIC fast_float)
+include(ExternalProject)
+
+# Define the external project
+ExternalProject_Add(simple_fastfloat_benchmark
+    GIT_REPOSITORY https://github.com/lemire/simple_fastfloat_benchmark.git
+    GIT_TAG        master  # or specify a particular commit/tag/branch
+    SOURCE_DIR     ${CMAKE_BINARY_DIR}/simple_fastfloat_benchmark
+    BINARY_DIR     ${CMAKE_BINARY_DIR}/simple_fastfloat_benchmark-build
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ""
+)
+set(DATA_DIR ${CMAKE_BINARY_DIR}/simple_fastfloat_benchmark/data)
+
+add_custom_target(CopyData ALL
+    COMMAND ${CMAKE_COMMAND} -E copy_directory ${DATA_DIR} ${CMAKE_CURRENT_BINARY_DIR}/data
+    DEPENDS simple_fastfloat_benchmark
+)
+add_dependencies(realbenchmark CopyData)
+target_compile_definitions(realbenchmark PUBLIC BENCHMARK_DATA_DIR="${CMAKE_CURRENT_BINARY_DIR}/data")