revert to -O2 (its faster on test models)

CMakeLists.txt

@@ -39,7 +39,7 @@ set(API_HEADERS_C ${API_HEADERS_CPP_DIR}/model.h)
 add_library(${PROJECT_NAME} SHARED ${SRC_FILES})
 target_link_libraries(${PROJECT_NAME} ${LIBS})
 target_include_directories(${PROJECT_NAME} PUBLIC eisgenerator)
-set_target_properties(${PROJECT_NAME} PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O3 -march=native -g" LINK_FLAGS "-flto")
+set_target_properties(${PROJECT_NAME} PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O2 -march=native -g" LINK_FLAGS "-flto")
 
 set(CMAKE_INSTALL_PREFIX "/usr")
 install(TARGETS ${PROJECT_NAME} DESTINATION lib)
@@ -55,7 +55,7 @@ add_executable(${PROJECT_NAME}_test ${SRC_FILES_TEST_APP})
 add_dependencies(${PROJECT_NAME}_test ${PROJECT_NAME})
 target_link_libraries(${PROJECT_NAME}_test ${LIBS_TEST})
 target_include_directories(${PROJECT_NAME}_test PUBLIC eisgenerator)
-set_target_properties(${PROJECT_NAME}_test PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O3 -march=native -g" LINK_FLAGS "-flto")
+set_target_properties(${PROJECT_NAME}_test PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O2 -march=native -g" LINK_FLAGS "-flto")
 install(TARGETS ${PROJECT_NAME}_test DESTINATION bin)
 
 link_directories(${CMAKE_CURRENT_BINARY_DIR})
@@ -65,7 +65,7 @@ add_executable(${PROJECT_NAME}_export ${SRC_FILES_TEST_APP})
 add_dependencies(${PROJECT_NAME}_export ${PROJECT_NAME})
 target_link_libraries(${PROJECT_NAME}_export ${LIBS_TEST})
 target_include_directories(${PROJECT_NAME}_export PUBLIC eisgenerator)
-set_target_properties(${PROJECT_NAME}_export PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O3 -march=native -g" LINK_FLAGS "-flto")
+set_target_properties(${PROJECT_NAME}_export PROPERTIES COMPILE_FLAGS "-std=c++20 -Wall -O2 -march=native -g" LINK_FLAGS "-flto")
 install(TARGETS ${PROJECT_NAME}_export DESTINATION bin)