69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// 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 "SIMDHelpers.h"
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#include <benchmark/benchmark.h>
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#include <random>
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#include <absl/algorithm/container.h>
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#include "absl/types/span.h"
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constexpr int bigNumber { 2399132 };
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class IterOffset : public benchmark::Fixture {
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public:
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void SetUp(const ::benchmark::State& /* state */) {
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std::random_device rd { };
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std::mt19937 gen { rd() };
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std::uniform_real_distribution<float> dist { 0.001f, 1.0f };
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std::uniform_int_distribution<int> jumpDist { 0, 3 };
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source = std::vector<float>(bigNumber);
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result.resize(state.range(0));
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absl::c_generate(source, [&]() { return dist(gen); });
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jumps.resize(state.range(0));
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offsets.resize(state.range(0));
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absl::c_generate(jumps, [&]() { return jumpDist(gen); });
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sfz::cumsum<int>(jumps, absl::MakeSpan(offsets));
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}
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void TearDown(const ::benchmark::State& /* state */) {
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}
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std::vector<float> source;
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std::vector<float> result;
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std::vector<int> offsets;
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std::vector<int> jumps;
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};
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BENCHMARK_DEFINE_F(IterOffset, Pointers)(benchmark::State& state) {
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for (auto _ : state)
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{
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sfz::diff<int>(offsets, absl::MakeSpan(jumps));
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auto jump = jumps.begin();
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auto in = source.begin();
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auto out = result.begin();
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while (out < result.end() && in < source.end()) {
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*out++ = *in;
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in += *jump++;
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}
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}
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}
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BENCHMARK_DEFINE_F(IterOffset, Offsets)(benchmark::State& state) {
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for (auto _ : state)
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{
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auto offset = offsets.begin();
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auto out = result.begin();
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while (offset < offsets.end())
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*out++ = source[*offset++];
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}
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}
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// Register the function as a benchmark
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BENCHMARK_REGISTER_F(IterOffset, Pointers)->RangeMultiplier(4)->Range((1 << 2), (1 << 12));
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BENCHMARK_REGISTER_F(IterOffset, Offsets)->RangeMultiplier(4)->Range((1 << 2), (1 << 12));
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BENCHMARK_MAIN();
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