Abseil Common Libraries (C++) (grcp 依赖)
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58 lines
1.9 KiB
58 lines
1.9 KiB
6 years ago
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// Copyright 2018 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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// http://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 "absl/time/civil_time.h"
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#include "benchmark/benchmark.h"
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namespace {
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// Benchmark Time(ns) CPU(ns) Iterations
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// -------------------------------------------------------------------------
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// BM_Difference_Days 20 20 34542508
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// BM_Step_Days 15 15 48098146
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// BM_Format 688 687 1019803
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// BM_Parse 921 920 762788
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// BM_RoundTripFormatParse 1766 1764 396092
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void BM_Difference_Days(benchmark::State& state) {
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const absl::CivilDay c(2014, 8, 22);
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const absl::CivilDay epoch(1970, 1, 1);
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while (state.KeepRunning()) {
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const absl::civil_diff_t n = c - epoch;
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benchmark::DoNotOptimize(n);
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}
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}
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BENCHMARK(BM_Difference_Days);
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void BM_Step_Days(benchmark::State& state) {
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const absl::CivilDay kStart(2014, 8, 22);
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absl::CivilDay c = kStart;
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while (state.KeepRunning()) {
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benchmark::DoNotOptimize(++c);
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}
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}
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BENCHMARK(BM_Step_Days);
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void BM_Format(benchmark::State& state) {
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const absl::CivilSecond c(2014, 1, 2, 3, 4, 5);
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while (state.KeepRunning()) {
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const std::string s = absl::FormatCivilTime(c);
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benchmark::DoNotOptimize(s);
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}
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}
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BENCHMARK(BM_Format);
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} // namespace
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