format_benchmark.cc (2203B)
1 // Copyright 2018 The Abseil Authors. 2 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // you may not use this file except in compliance with the License. 4 // You may obtain a copy of the License at 5 // 6 // https://www.apache.org/licenses/LICENSE-2.0 7 // 8 // Unless required by applicable law or agreed to in writing, software 9 // distributed under the License is distributed on an "AS IS" BASIS, 10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 #include <cstddef> 15 #include <string> 16 17 #include "absl/time/internal/test_util.h" 18 #include "absl/time/time.h" 19 #include "benchmark/benchmark.h" 20 21 namespace { 22 23 namespace { 24 const char* const kFormats[] = { 25 absl::RFC1123_full, // 0 26 absl::RFC1123_no_wday, // 1 27 absl::RFC3339_full, // 2 28 absl::RFC3339_sec, // 3 29 "%Y-%m-%d%ET%H:%M:%S", // 4 30 "%Y-%m-%d", // 5 31 }; 32 const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]); 33 } // namespace 34 35 void BM_Format_FormatTime(benchmark::State& state) { 36 const std::string fmt = kFormats[state.range(0)]; 37 state.SetLabel(fmt); 38 const absl::TimeZone lax = 39 absl::time_internal::LoadTimeZone("America/Los_Angeles"); 40 const absl::Time t = 41 absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax) + 42 absl::Nanoseconds(1); 43 while (state.KeepRunning()) { 44 benchmark::DoNotOptimize(absl::FormatTime(fmt, t, lax).length()); 45 } 46 } 47 BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1); 48 49 void BM_Format_ParseTime(benchmark::State& state) { 50 const std::string fmt = kFormats[state.range(0)]; 51 state.SetLabel(fmt); 52 const absl::TimeZone lax = 53 absl::time_internal::LoadTimeZone("America/Los_Angeles"); 54 absl::Time t = absl::FromCivil(absl::CivilSecond(1977, 6, 28, 9, 8, 7), lax) + 55 absl::Nanoseconds(1); 56 const std::string when = absl::FormatTime(fmt, t, lax); 57 std::string err; 58 while (state.KeepRunning()) { 59 benchmark::DoNotOptimize(absl::ParseTime(fmt, when, lax, &t, &err)); 60 } 61 } 62 BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1); 63 64 } // namespace