| #include <benchmark/benchmark.h> | |
| #include <array> | |
| // Easy way to get a big size object. | |
| static std::array<int, 1000000> arr{}; | |
| static void BM_Array(benchmark::State& state) { | |
| for (auto _ : state) { | |
| benchmark::DoNotOptimize(arr); | |
| } | |
| } | |
| static void BM_PtrToArray(benchmark::State& state) { | |
| for (auto _ : state) { | |
| benchmark::DoNotOptimize(&arr); | |
| } | |
| } | |
| BENCHMARK(BM_Array); | |
| BENCHMARK(BM_PtrToArray); | |
| BENCHMARK_MAIN(); |
| .PHONY: all build bench.bin run | |
| all: build run | |
| build: bench.bin | |
| run: | |
| ./bench.bin | |
| bench.bin: main.cc | |
| $(CXX) main.cc -g -lbenchmark -lpthread -Ofast -march=native -o bench.bin | |
| asm: | |
| objdump -C -M intel -S ./bench.bin |