Run benchmark on SHPSetFastModeReadObject

Makefile.am

@@ -21,6 +21,7 @@ EXTRA_DIST = makefile.vc CMakeLists.txt autogen.sh \
 		tests/CMakeLists.txt \
 		tests/dbf_test.cc \
 		tests/sbn_test.cc \
+		tests/shp_bench.cc \
 		tests/shp_test.cc \
 		tests/test1.sh tests/test2.sh tests/test3.sh \
 		tests/expect1.out tests/expect2.out tests/expect3.out \

tests/CMakeLists.txt

@@ -2,15 +2,30 @@
 
 project(${CMAKE_PROJECT_NAME}Tests CXX)
 
-# Set up GoogleTest
+# Set up GoogleTest and Benchmark
 include(FetchContent)
 
+FetchContent_Declare(
+  benchmark
+  GIT_REPOSITORY https://github.com/google/benchmark.git
+  GIT_TAG c19cfee61e136effb05a7fc8a037b0db3b13bd4c
+  GIT_SHALLOW TRUE
+)
+
 FetchContent_Declare(
   googletest
   GIT_REPOSITORY https://github.com/google/googletest.git
   GIT_TAG v1.15.2
+  GIT_SHALLOW TRUE
 )
 
+set(BENCHMARK_DOWNLOAD_DEPENDENCIES OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_ENABLE_INSTALL OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_INSTALL_DOCS OFF CACHE BOOL "" FORCE)
+
+FetchContent_MakeAvailable(benchmark)
+
 # For Windows: Prevent overriding the parent project's compiler/linker settings
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 
@@ -22,9 +37,11 @@ set(INSTALL_GTEST OFF CACHE BOOL "" FORCE)
 
 FetchContent_MakeAvailable(googletest)
 
-foreach(executable dbf_test sbn_test shp_test)
+set_target_properties(gtest gtest_main benchmark benchmark_main PROPERTIES FOLDER "tests/third-party")
+
+foreach(executable dbf_test sbn_test shp_bench shp_test)
   add_executable(${executable} ${PROJECT_SOURCE_DIR}/${executable}.cc)
-  target_link_libraries(${executable} PRIVATE ${PACKAGE} gtest)
+  target_link_libraries(${executable} PRIVATE ${PACKAGE} gtest benchmark)
   add_test(
     NAME ${executable}
     COMMAND ${executable}

tests/shp_bench.cc

@@ -0,0 +1,42 @@
+#include <filesystem>
+
+#include <benchmark/benchmark.h>
+#include "shapefil.h"
+
+namespace fs = std::filesystem;
+
+namespace
+{
+
+static const auto kTestData = fs::path{"shape_eg_data"};
+
+template <bool fastMode> static void Benchmark_ReadAll(benchmark::State &state)
+{
+    for (auto _ : state)
+    {
+        const auto filename = kTestData / "mpatch3.shp";
+        const auto handle = SHPOpen(filename.string().c_str(), "rb");
+        if constexpr (fastMode)
+        {
+            SHPSetFastModeReadObject(handle, 1);
+        }
+        int nEntities;
+        SHPGetInfo(handle, &nEntities, nullptr, nullptr, nullptr);
+        for (int i = 0; i < nEntities; ++i)
+        {
+            auto obj = SHPReadObject(handle, i);
+            SHPDestroyObject(obj);
+        }
+        SHPClose(handle);
+    }
+}
+
+constexpr auto Benchmark_ReadAllSlow = Benchmark_ReadAll<false>;
+constexpr auto Benchmark_ReadAllFast = Benchmark_ReadAll<true>;
+
+BENCHMARK(Benchmark_ReadAllSlow);
+BENCHMARK(Benchmark_ReadAllFast);
+
+}  // namespace
+
+BENCHMARK_MAIN();