128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
// 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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// 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 "absl/time/civil_time.h"
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#include <numeric>
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#include <vector>
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#include "absl/hash/hash.h"
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#include "benchmark/benchmark.h"
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namespace {
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// Run on (12 X 3492 MHz CPUs); 2018-11-05T13:44:29.814239103-08:00
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// CPU: Intel Haswell with HyperThreading (6 cores) dL1:32KB dL2:256KB dL3:15MB
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// Benchmark Time(ns) CPU(ns) Iterations
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// ----------------------------------------------------------------
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// BM_Difference_Days 14.5 14.5 48531105
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// BM_Step_Days 12.6 12.6 54876006
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// BM_Format 587 587 1000000
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// BM_Parse 692 692 1000000
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// BM_RoundTripFormatParse 1309 1309 532075
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// BM_CivilYearAbslHash 0.710 0.710 976400000
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// BM_CivilMonthAbslHash 1.13 1.13 619500000
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// BM_CivilDayAbslHash 1.70 1.70 426000000
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// BM_CivilHourAbslHash 2.45 2.45 287600000
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// BM_CivilMinuteAbslHash 3.21 3.21 226200000
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// BM_CivilSecondAbslHash 4.10 4.10 171800000
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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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void BM_Parse(benchmark::State& state) {
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const std::string f = "2014-01-02T03:04:05";
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absl::CivilSecond c;
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while (state.KeepRunning()) {
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const bool b = absl::ParseCivilTime(f, &c);
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benchmark::DoNotOptimize(b);
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}
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}
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BENCHMARK(BM_Parse);
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void BM_RoundTripFormatParse(benchmark::State& state) {
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const absl::CivilSecond c(2014, 1, 2, 3, 4, 5);
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absl::CivilSecond out;
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while (state.KeepRunning()) {
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const bool b = absl::ParseCivilTime(absl::FormatCivilTime(c), &out);
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benchmark::DoNotOptimize(b);
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}
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}
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BENCHMARK(BM_RoundTripFormatParse);
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template <typename T>
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void BM_CivilTimeAbslHash(benchmark::State& state) {
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const int kSize = 100000;
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std::vector<T> civil_times(kSize);
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std::iota(civil_times.begin(), civil_times.end(), T(2018));
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absl::Hash<T> absl_hasher;
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while (state.KeepRunningBatch(kSize)) {
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for (const T civil_time : civil_times) {
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benchmark::DoNotOptimize(absl_hasher(civil_time));
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}
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}
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}
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void BM_CivilYearAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilYear>(state);
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}
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void BM_CivilMonthAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilMonth>(state);
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}
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void BM_CivilDayAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilDay>(state);
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}
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void BM_CivilHourAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilHour>(state);
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}
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void BM_CivilMinuteAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilMinute>(state);
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}
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void BM_CivilSecondAbslHash(benchmark::State& state) {
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BM_CivilTimeAbslHash<absl::CivilSecond>(state);
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}
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BENCHMARK(BM_CivilYearAbslHash);
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BENCHMARK(BM_CivilMonthAbslHash);
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BENCHMARK(BM_CivilDayAbslHash);
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BENCHMARK(BM_CivilHourAbslHash);
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BENCHMARK(BM_CivilMinuteAbslHash);
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BENCHMARK(BM_CivilSecondAbslHash);
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} // namespace
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