75 lines
2 KiB
C++
75 lines
2 KiB
C++
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// SPDX-License-Identifier: BSD-2-Clause
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// This code is part of the sfizz library and is licensed under a BSD 2-clause
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// license. You should have receive a LICENSE.md file along with the code.
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// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
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#include <benchmark/benchmark.h>
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#include <vector>
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#include <numeric>
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#include <random>
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#include "../src/sfizz/CCMap.h"
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#include <absl/algorithm/container.h>
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#include <absl/types/span.h>
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constexpr int maxCC { 256 };
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class MyFixture : public benchmark::Fixture {
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public:
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void SetUp(const ::benchmark::State& state)
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{
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std::random_device rd {};
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std::mt19937 gen { rd() };
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std::array<int, maxCC> sourceCC;
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absl::c_iota(sourceCC, 0);
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absl::c_shuffle(sourceCC, gen);
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ccs.resize(state.range(0));
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std::copy(sourceCC.begin(), sourceCC.begin() + state.range(0), ccs.begin());
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std::uniform_real_distribution<float> distFloat { 0.1f, 1.0f };
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vector.resize(maxCC);
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absl::c_generate(vector, [&]() {
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return distFloat(gen);
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});
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for (unsigned i = 0; i < state.range(0); ++i) {
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map[ccs[i]] = vector[ccs[i]];
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}
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}
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void TearDown(const ::benchmark::State& /* state */)
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{
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}
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std::vector<int> ccs;
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std::vector<float> vector;
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sfz::CCMap<float> map { 1 };
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};
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BENCHMARK_DEFINE_F(MyFixture, ArraySearch)
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(benchmark::State& state)
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{
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float value { 1 };
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for (auto _ : state) {
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for (unsigned i = 0; i < state.range(0); ++i) {
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value *= vector[ccs[i]];
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}
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benchmark::DoNotOptimize(value);
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}
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}
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BENCHMARK_DEFINE_F(MyFixture, MapSearch)
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(benchmark::State& state)
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{
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float value { 0 };
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for (auto _ : state) {
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for (unsigned i = 0; i < state.range(0); ++i) {
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value *= map[ccs[i]];
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}
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benchmark::DoNotOptimize(value);
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}
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}
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BENCHMARK_REGISTER_F(MyFixture, ArraySearch)->Range(4, maxCC);
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BENCHMARK_REGISTER_F(MyFixture, MapSearch)->Range(4, maxCC);
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BENCHMARK_MAIN();
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