Abseil Common Libraries (C++) (grcp 依赖)
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73 lines
2.3 KiB
73 lines
2.3 KiB
// Copyright 2022 The Abseil Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include <cstdint> |
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#include <vector> |
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#include "benchmark/benchmark.h" |
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#include "absl/base/optimization.h" |
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#include "absl/numeric/bits.h" |
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#include "absl/random/random.h" |
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namespace absl { |
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namespace { |
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template <typename T> |
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static void BM_bitwidth(benchmark::State& state) { |
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const auto count = static_cast<size_t>(state.range(0)); |
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absl::BitGen rng; |
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std::vector<T> values; |
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values.reserve(count); |
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for (size_t i = 0; i < count; ++i) { |
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values.push_back(absl::Uniform<T>(rng, 0, std::numeric_limits<T>::max())); |
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} |
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while (state.KeepRunningBatch(count)) { |
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for (size_t i = 0; i < count; ++i) { |
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benchmark::DoNotOptimize(values[i]); |
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} |
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} |
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} |
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BENCHMARK_TEMPLATE(BM_bitwidth, uint8_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth, uint16_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth, uint32_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth, uint64_t)->Range(1, 1 << 20); |
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template <typename T> |
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static void BM_bitwidth_nonzero(benchmark::State& state) { |
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const auto count = static_cast<size_t>(state.range(0)); |
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absl::BitGen rng; |
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std::vector<T> values; |
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values.reserve(count); |
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for (size_t i = 0; i < count; ++i) { |
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values.push_back(absl::Uniform<T>(rng, 1, std::numeric_limits<T>::max())); |
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} |
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while (state.KeepRunningBatch(count)) { |
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for (size_t i = 0; i < count; ++i) { |
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const T value = values[i]; |
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ABSL_ASSUME(value > 0); |
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benchmark::DoNotOptimize(value); |
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} |
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} |
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} |
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BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint8_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint16_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint32_t)->Range(1, 1 << 20); |
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BENCHMARK_TEMPLATE(BM_bitwidth_nonzero, uint64_t)->Range(1, 1 << 20); |
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} // namespace |
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} // namespace absl
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