mirror of
https://github.com/nlohmann/json.git
synced 2026-09-30 14:05:18 +00:00
839e08b70e
benchmarks_view.cpp adds ViewParse, ViewRead (a reused document), ViewParseIndented, ViewAccept, and ViewMaterialize on the files of ParseString, so that each row can be read against the json::parse row of the same file; benchmarks.cpp gains Accept (json::accept) as the counterpart of ViewAccept. The view benchmarks are built only if the header directory has json_view.hpp, so that older versions can still be benchmarked. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
48 lines
2.1 KiB
CMake
48 lines
2.1 KiB
CMake
cmake_minimum_required(VERSION 3.14)
|
|
project(JSON_Benchmarks LANGUAGES CXX)
|
|
|
|
# set compiler flags
|
|
if((CMAKE_CXX_COMPILER_ID MATCHES GNU) OR (CMAKE_CXX_COMPILER_ID MATCHES Clang))
|
|
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto -DNDEBUG -O3")
|
|
endif()
|
|
|
|
# configure Google Benchmark; a fixed release, so that results stay comparable
|
|
set(JSON_GOOGLE_BENCHMARK_VERSION 1.9.5)
|
|
include(FetchContent)
|
|
|
|
# only the library is needed; -Werror would break the pinned release as soon as
|
|
# a newer compiler adds a warning
|
|
set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
|
|
set(BENCHMARK_ENABLE_INSTALL OFF CACHE BOOL "" FORCE)
|
|
set(BENCHMARK_ENABLE_WERROR OFF CACHE BOOL "" FORCE)
|
|
|
|
FetchContent_Declare(benchmark
|
|
URL https://github.com/google/benchmark/archive/refs/tags/v${JSON_GOOGLE_BENCHMARK_VERSION}.tar.gz
|
|
URL_HASH SHA256=9631341c82bac4a288bef951f8b26b41f69021794184ece969f8473977eaa340
|
|
DOWNLOAD_EXTRACT_TIMESTAMP TRUE
|
|
)
|
|
FetchContent_MakeAvailable(benchmark)
|
|
|
|
# download test data
|
|
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake ${CMAKE_MODULE_PATH})
|
|
include(download_test_data)
|
|
|
|
# the header to benchmark; point this at a directory holding another version's
|
|
# nlohmann/json.hpp to compare versions (see README.md)
|
|
set(JSON_BENCHMARK_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../single_include" CACHE PATH
|
|
"directory containing the nlohmann/json.hpp to benchmark")
|
|
|
|
# benchmark binary
|
|
add_executable(json_benchmarks src/benchmarks.cpp)
|
|
target_compile_features(json_benchmarks PRIVATE cxx_std_11)
|
|
target_link_libraries(json_benchmarks benchmark ${CMAKE_THREAD_LIBS_INIT})
|
|
add_dependencies(json_benchmarks download_test_data)
|
|
target_include_directories(json_benchmarks PRIVATE ${JSON_BENCHMARK_INCLUDE_DIR} ${CMAKE_BINARY_DIR}/include)
|
|
|
|
# the json_document benchmarks, unless the header to benchmark predates json_view.hpp
|
|
if(EXISTS "${JSON_BENCHMARK_INCLUDE_DIR}/nlohmann/json_view.hpp")
|
|
target_sources(json_benchmarks PRIVATE src/benchmarks_view.cpp)
|
|
else()
|
|
message(STATUS "${JSON_BENCHMARK_INCLUDE_DIR} has no nlohmann/json_view.hpp: skipping the json_document benchmarks")
|
|
endif()
|