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68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/* vim:set ts=2 sw=2 sts=2 et: */
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/**
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* \author Marcus Holland-Moritz (github@mhxnet.de)
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* \copyright Copyright (c) Marcus Holland-Moritz
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*
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* This file is part of dwarfs.
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*
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* dwarfs is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* dwarfs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with dwarfs. If not, see <https://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#include <array>
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#include <numeric>
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#include <random>
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#include <unordered_map>
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#include <benchmark/benchmark.h>
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#include <dwarfs/writer/internal/nilsimsa.h>
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namespace {
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using namespace dwarfs::writer::internal;
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std::vector<uint8_t> random_byte_vector(size_t len) {
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static std::mt19937 g{42};
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static std::uniform_int_distribution<uint16_t> d{0, 255};
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std::vector<uint8_t> v(len);
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std::generate(v.begin(), v.end(), [&] { return d(g); });
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return v;
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}
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template <size_t N>
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void nilsimsa_bytes(::benchmark::State& state) {
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auto input = random_byte_vector(N);
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for (auto _ : state) {
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nilsimsa ns;
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nilsimsa::hash_type h;
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ns.update(input.data(), input.size());
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ns.finalize(h);
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benchmark::DoNotOptimize(h);
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}
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state.SetItemsProcessed(state.iterations() * N);
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}
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} // namespace
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BENCHMARK(nilsimsa_bytes<32>);
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BENCHMARK(nilsimsa_bytes<1024>);
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BENCHMARK(nilsimsa_bytes<1024 * 32>);
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BENCHMARK(nilsimsa_bytes<1024 * 1024>);
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BENCHMARK_MAIN();
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