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https://github.com/capstone-engine/llvm-capstone.git
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f6e09e537b
I've put some work into the Google Benchmark library in order to make it easier to benchmark libc++. These changes have already been upstreamed into Google Benchmark and this patch applies the changes to the in-tree version. The main improvement in the addition of a 'compare_bench.py' script which makes it very easy to compare benchmarks. For example to compare the native STL to libc++ you would run: `$ compare_bench.py ./util_smartptr.native.out ./util_smartptr.libcxx.out` And the output would look like: RUNNING: ./util_smartptr.native.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 62 ns 62 ns 10937500 BM_SharedPtrIncDecRef 31 ns 31 ns 23972603 BM_WeakPtrIncDecRef 28 ns 28 ns 23648649 RUNNING: ./util_smartptr.libcxx.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 46 ns 46 ns 14957265 BM_SharedPtrIncDecRef 31 ns 31 ns 22435897 BM_WeakPtrIncDecRef 34 ns 34 ns 21084337 Comparing ./util_smartptr.native.out to ./util_smartptr.libcxx.out Benchmark Time CPU ----------------------------------------------------- BM_SharedPtrCreateDestroy -0.26 -0.26 BM_SharedPtrIncDecRef +0.00 +0.00 BM_WeakPtrIncDecRef +0.21 +0.21 llvm-svn: 278147
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
#include <unordered_set>
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#include <vector>
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#include <cstdint>
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#include "benchmark/benchmark_api.h"
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#include "GenerateInput.hpp"
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constexpr std::size_t TestNumInputs = 1024;
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template <class GenInputs>
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void BM_Sort(benchmark::State& st, GenInputs gen) {
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using ValueType = typename decltype(gen(0))::value_type;
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const auto in = gen(st.range(0));
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std::vector<ValueType> inputs[5];
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auto reset_inputs = [&]() {
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for (auto& C : inputs) {
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C = in;
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benchmark::DoNotOptimize(C.data());
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}
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};
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reset_inputs();
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while (st.KeepRunning()) {
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for (auto& I : inputs) {
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std::sort(I.data(), I.data() + I.size());
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benchmark::DoNotOptimize(I.data());
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}
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st.PauseTiming();
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reset_inputs();
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benchmark::ClobberMemory();
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st.ResumeTiming();
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}
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}
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BENCHMARK_CAPTURE(BM_Sort, random_uint32,
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getRandomIntegerInputs<uint32_t>)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, sorted_ascending_uint32,
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getSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, sorted_descending_uint32,
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getReverseSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, single_element_uint32,
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getDuplicateIntegerInputs<uint32_t>)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, pipe_organ_uint32,
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getPipeOrganIntegerInputs<uint32_t>)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, random_strings,
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getRandomStringInputs)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, sorted_ascending_strings,
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getSortedStringInputs)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, sorted_descending_strings,
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getReverseSortedStringInputs)->Arg(TestNumInputs);
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BENCHMARK_CAPTURE(BM_Sort, single_element_strings,
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getDuplicateStringInputs)->Arg(TestNumInputs);
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BENCHMARK_MAIN()
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