diff options
Diffstat (limited to 'absl/time/internal/cctz/src')
| -rw-r--r-- | absl/time/internal/cctz/src/cctz_benchmark.cc | 982 | ||||
| -rw-r--r-- | absl/time/internal/cctz/src/time_zone_format_test.cc | 9 |
2 files changed, 989 insertions, 2 deletions
diff --git a/absl/time/internal/cctz/src/cctz_benchmark.cc b/absl/time/internal/cctz/src/cctz_benchmark.cc new file mode 100644 index 000000000000..f13cb4ee6b5f --- /dev/null +++ b/absl/time/internal/cctz/src/cctz_benchmark.cc @@ -0,0 +1,982 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <algorithm> +#include <cassert> +#include <chrono> +#include <ctime> +#include <random> +#include <string> +#include <vector> + +#include "benchmark/benchmark.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" +#include "time_zone_impl.h" + +namespace { + +namespace cctz = absl::time_internal::cctz; + +void BM_Difference_Days(benchmark::State& state) { + const cctz::civil_day c(2014, 8, 22); + const cctz::civil_day epoch(1970, 1, 1); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(c - epoch); + } +} +BENCHMARK(BM_Difference_Days); + +void BM_Step_Days(benchmark::State& state) { + const cctz::civil_day kStart(2014, 8, 22); + cctz::civil_day c = kStart; + while (state.KeepRunning()) { + benchmark::DoNotOptimize(++c); + } +} +BENCHMARK(BM_Step_Days); + +const char RFC3339_full[] = "%Y-%m-%dT%H:%M:%E*S%Ez"; +const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez"; + +const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z"; +const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z"; + +// A list of known time-zone names. +// TODO: Refactor with src/time_zone_lookup_test.cc. +const char* const kTimeZoneNames[] = { + "Africa/Abidjan", + "Africa/Accra", + "Africa/Addis_Ababa", + "Africa/Algiers", + "Africa/Asmara", + "Africa/Asmera", + "Africa/Bamako", + "Africa/Bangui", + "Africa/Banjul", + "Africa/Bissau", + "Africa/Blantyre", + "Africa/Brazzaville", + "Africa/Bujumbura", + "Africa/Cairo", + "Africa/Casablanca", + "Africa/Ceuta", + "Africa/Conakry", + "Africa/Dakar", + "Africa/Dar_es_Salaam", + "Africa/Djibouti", + "Africa/Douala", + "Africa/El_Aaiun", + "Africa/Freetown", + "Africa/Gaborone", + "Africa/Harare", + "Africa/Johannesburg", + "Africa/Juba", + "Africa/Kampala", + "Africa/Khartoum", + "Africa/Kigali", + "Africa/Kinshasa", + "Africa/Lagos", + "Africa/Libreville", + "Africa/Lome", + "Africa/Luanda", + "Africa/Lubumbashi", + "Africa/Lusaka", + "Africa/Malabo", + "Africa/Maputo", + "Africa/Maseru", + "Africa/Mbabane", + "Africa/Mogadishu", + "Africa/Monrovia", + "Africa/Nairobi", + "Africa/Ndjamena", + "Africa/Niamey", + "Africa/Nouakchott", + "Africa/Ouagadougou", + "Africa/Porto-Novo", + "Africa/Sao_Tome", + "Africa/Timbuktu", + "Africa/Tripoli", + "Africa/Tunis", + "Africa/Windhoek", + "America/Adak", + "America/Anchorage", + "America/Anguilla", + "America/Antigua", + "America/Araguaina", + "America/Argentina/Buenos_Aires", + "America/Argentina/Catamarca", + "America/Argentina/ComodRivadavia", + "America/Argentina/Cordoba", + "America/Argentina/Jujuy", + "America/Argentina/La_Rioja", + "America/Argentina/Mendoza", + "America/Argentina/Rio_Gallegos", + "America/Argentina/Salta", + "America/Argentina/San_Juan", + "America/Argentina/San_Luis", + "America/Argentina/Tucuman", + "America/Argentina/Ushuaia", + "America/Aruba", + "America/Asuncion", + "America/Atikokan", + "America/Atka", + "America/Bahia", + "America/Bahia_Banderas", + "America/Barbados", + "America/Belem", + "America/Belize", + "America/Blanc-Sablon", + "America/Boa_Vista", + "America/Bogota", + "America/Boise", + "America/Buenos_Aires", + "America/Cambridge_Bay", + "America/Campo_Grande", + "America/Cancun", + "America/Caracas", + "America/Catamarca", + "America/Cayenne", + "America/Cayman", + "America/Chicago", + "America/Chihuahua", + "America/Coral_Harbour", + "America/Cordoba", + "America/Costa_Rica", + "America/Creston", + "America/Cuiaba", + "America/Curacao", + "America/Danmarkshavn", + "America/Dawson", + "America/Dawson_Creek", + "America/Denver", + "America/Detroit", + "America/Dominica", + "America/Edmonton", + "America/Eirunepe", + "America/El_Salvador", + "America/Ensenada", + "America/Fort_Nelson", + "America/Fort_Wayne", + "America/Fortaleza", + "America/Glace_Bay", + "America/Godthab", + "America/Goose_Bay", + "America/Grand_Turk", + "America/Grenada", + "America/Guadeloupe", + "America/Guatemala", + "America/Guayaquil", + "America/Guyana", + "America/Halifax", + "America/Havana", + "America/Hermosillo", + "America/Indiana/Indianapolis", + "America/Indiana/Knox", + "America/Indiana/Marengo", + "America/Indiana/Petersburg", + "America/Indiana/Tell_City", + "America/Indiana/Vevay", + "America/Indiana/Vincennes", + "America/Indiana/Winamac", + "America/Indianapolis", + "America/Inuvik", + "America/Iqaluit", + "America/Jamaica", + "America/Jujuy", + "America/Juneau", + "America/Kentucky/Louisville", + "America/Kentucky/Monticello", + "America/Knox_IN", + "America/Kralendijk", + "America/La_Paz", + "America/Lima", + "America/Los_Angeles", + "America/Louisville", + "America/Lower_Princes", + "America/Maceio", + "America/Managua", + "America/Manaus", + "America/Marigot", + "America/Martinique", + "America/Matamoros", + "America/Mazatlan", + "America/Mendoza", + "America/Menominee", + "America/Merida", + "America/Metlakatla", + "America/Mexico_City", + "America/Miquelon", + "America/Moncton", + "America/Monterrey", + "America/Montevideo", + "America/Montreal", + "America/Montserrat", + "America/Nassau", + "America/New_York", + "America/Nipigon", + "America/Nome", + "America/Noronha", + "America/North_Dakota/Beulah", + "America/North_Dakota/Center", + "America/North_Dakota/New_Salem", + "America/Ojinaga", + "America/Panama", + "America/Pangnirtung", + "America/Paramaribo", + "America/Phoenix", + "America/Port-au-Prince", + "America/Port_of_Spain", + "America/Porto_Acre", + "America/Porto_Velho", + "America/Puerto_Rico", + "America/Punta_Arenas", + "America/Rainy_River", + "America/Rankin_Inlet", + "America/Recife", + "America/Regina", + "America/Resolute", + "America/Rio_Branco", + "America/Rosario", + "America/Santa_Isabel", + "America/Santarem", + "America/Santiago", + "America/Santo_Domingo", + "America/Sao_Paulo", + "America/Scoresbysund", + "America/Shiprock", + "America/Sitka", + "America/St_Barthelemy", + "America/St_Johns", + "America/St_Kitts", + "America/St_Lucia", + "America/St_Thomas", + "America/St_Vincent", + "America/Swift_Current", + "America/Tegucigalpa", + "America/Thule", + "America/Thunder_Bay", + "America/Tijuana", + "America/Toronto", + "America/Tortola", + "America/Vancouver", + "America/Virgin", + "America/Whitehorse", + "America/Winnipeg", + "America/Yakutat", + "America/Yellowknife", + "Antarctica/Casey", + "Antarctica/Davis", + "Antarctica/DumontDUrville", + "Antarctica/Macquarie", + "Antarctica/Mawson", + "Antarctica/McMurdo", + "Antarctica/Palmer", + "Antarctica/Rothera", + "Antarctica/South_Pole", + "Antarctica/Syowa", + "Antarctica/Troll", + "Antarctica/Vostok", + "Arctic/Longyearbyen", + "Asia/Aden", + "Asia/Almaty", + "Asia/Amman", + "Asia/Anadyr", + "Asia/Aqtau", + "Asia/Aqtobe", + "Asia/Ashgabat", + "Asia/Ashkhabad", + "Asia/Atyrau", + "Asia/Baghdad", + "Asia/Bahrain", + "Asia/Baku", + "Asia/Bangkok", + "Asia/Barnaul", + "Asia/Beirut", + "Asia/Bishkek", + "Asia/Brunei", + "Asia/Calcutta", + "Asia/Chita", + "Asia/Choibalsan", + "Asia/Chongqing", + "Asia/Chungking", + "Asia/Colombo", + "Asia/Dacca", + "Asia/Damascus", + "Asia/Dhaka", + "Asia/Dili", + "Asia/Dubai", + "Asia/Dushanbe", + "Asia/Famagusta", + "Asia/Gaza", + "Asia/Harbin", + "Asia/Hebron", + "Asia/Ho_Chi_Minh", + "Asia/Hong_Kong", + "Asia/Hovd", + "Asia/Irkutsk", + "Asia/Istanbul", + "Asia/Jakarta", + "Asia/Jayapura", + "Asia/Jerusalem", + "Asia/Kabul", + "Asia/Kamchatka", + "Asia/Karachi", + "Asia/Kashgar", + "Asia/Kathmandu", + "Asia/Katmandu", + "Asia/Khandyga", + "Asia/Kolkata", + "Asia/Krasnoyarsk", + "Asia/Kuala_Lumpur", + "Asia/Kuching", + "Asia/Kuwait", + "Asia/Macao", + "Asia/Macau", + "Asia/Magadan", + "Asia/Makassar", + "Asia/Manila", + "Asia/Muscat", + "Asia/Nicosia", + "Asia/Novokuznetsk", + "Asia/Novosibirsk", + "Asia/Omsk", + "Asia/Oral", + "Asia/Phnom_Penh", + "Asia/Pontianak", + "Asia/Pyongyang", + "Asia/Qatar", + "Asia/Qyzylorda", + "Asia/Rangoon", + "Asia/Riyadh", + "Asia/Saigon", + "Asia/Sakhalin", + "Asia/Samarkand", + "Asia/Seoul", + "Asia/Shanghai", + "Asia/Singapore", + "Asia/Srednekolymsk", + "Asia/Taipei", + "Asia/Tashkent", + "Asia/Tbilisi", + "Asia/Tehran", + "Asia/Tel_Aviv", + "Asia/Thimbu", + "Asia/Thimphu", + "Asia/Tokyo", + "Asia/Tomsk", + "Asia/Ujung_Pandang", + "Asia/Ulaanbaatar", + "Asia/Ulan_Bator", + "Asia/Urumqi", + "Asia/Ust-Nera", + "Asia/Vientiane", + "Asia/Vladivostok", + "Asia/Yakutsk", + "Asia/Yangon", + "Asia/Yekaterinburg", + "Asia/Yerevan", + "Atlantic/Azores", + "Atlantic/Bermuda", + "Atlantic/Canary", + "Atlantic/Cape_Verde", + "Atlantic/Faeroe", + "Atlantic/Faroe", + "Atlantic/Jan_Mayen", + "Atlantic/Madeira", + "Atlantic/Reykjavik", + "Atlantic/South_Georgia", + "Atlantic/St_Helena", + "Atlantic/Stanley", + "Australia/ACT", + "Australia/Adelaide", + "Australia/Brisbane", + "Australia/Broken_Hill", + "Australia/Canberra", + "Australia/Currie", + "Australia/Darwin", + "Australia/Eucla", + "Australia/Hobart", + "Australia/LHI", + "Australia/Lindeman", + "Australia/Lord_Howe", + "Australia/Melbourne", + "Australia/NSW", + "Australia/North", + "Australia/Perth", + "Australia/Queensland", + "Australia/South", + "Australia/Sydney", + "Australia/Tasmania", + "Australia/Victoria", + "Australia/West", + "Australia/Yancowinna", + "Brazil/Acre", + "Brazil/DeNoronha", + "Brazil/East", + "Brazil/West", + "CET", + "CST6CDT", + "Canada/Atlantic", + "Canada/Central", + "Canada/Eastern", + "Canada/Mountain", + "Canada/Newfoundland", + "Canada/Pacific", + "Canada/Saskatchewan", + "Canada/Yukon", + "Chile/Continental", + "Chile/EasterIsland", + "Cuba", + "EET", + "EST", + "EST5EDT", + "Egypt", + "Eire", + "Etc/GMT", + "Etc/GMT+0", + "Etc/GMT+1", + "Etc/GMT+10", + "Etc/GMT+11", + "Etc/GMT+12", + "Etc/GMT+2", + "Etc/GMT+3", + "Etc/GMT+4", + "Etc/GMT+5", + "Etc/GMT+6", + "Etc/GMT+7", + "Etc/GMT+8", + "Etc/GMT+9", + "Etc/GMT-0", + "Etc/GMT-1", + "Etc/GMT-10", + "Etc/GMT-11", + "Etc/GMT-12", + "Etc/GMT-13", + "Etc/GMT-14", + "Etc/GMT-2", + "Etc/GMT-3", + "Etc/GMT-4", + "Etc/GMT-5", + "Etc/GMT-6", + "Etc/GMT-7", + "Etc/GMT-8", + "Etc/GMT-9", + "Etc/GMT0", + "Etc/Greenwich", + "Etc/UCT", + "Etc/UTC", + "Etc/Universal", + "Etc/Zulu", + "Europe/Amsterdam", + "Europe/Andorra", + "Europe/Astrakhan", + "Europe/Athens", + "Europe/Belfast", + "Europe/Belgrade", + "Europe/Berlin", + "Europe/Bratislava", + "Europe/Brussels", + "Europe/Bucharest", + "Europe/Budapest", + "Europe/Busingen", + "Europe/Chisinau", + "Europe/Copenhagen", + "Europe/Dublin", + "Europe/Gibraltar", + "Europe/Guernsey", + "Europe/Helsinki", + "Europe/Isle_of_Man", + "Europe/Istanbul", + "Europe/Jersey", + "Europe/Kaliningrad", + "Europe/Kiev", + "Europe/Kirov", + "Europe/Lisbon", + "Europe/Ljubljana", + "Europe/London", + "Europe/Luxembourg", + "Europe/Madrid", + "Europe/Malta", + "Europe/Mariehamn", + "Europe/Minsk", + "Europe/Monaco", + "Europe/Moscow", + "Europe/Nicosia", + "Europe/Oslo", + "Europe/Paris", + "Europe/Podgorica", + "Europe/Prague", + "Europe/Riga", + "Europe/Rome", + "Europe/Samara", + "Europe/San_Marino", + "Europe/Sarajevo", + "Europe/Saratov", + "Europe/Simferopol", + "Europe/Skopje", + "Europe/Sofia", + "Europe/Stockholm", + "Europe/Tallinn", + "Europe/Tirane", + "Europe/Tiraspol", + "Europe/Ulyanovsk", + "Europe/Uzhgorod", + "Europe/Vaduz", + "Europe/Vatican", + "Europe/Vienna", + "Europe/Vilnius", + "Europe/Volgograd", + "Europe/Warsaw", + "Europe/Zagreb", + "Europe/Zaporozhye", + "Europe/Zurich", + "GB", + "GB-Eire", + "GMT", + "GMT+0", + "GMT-0", + "GMT0", + "Greenwich", + "HST", + "Hongkong", + "Iceland", + "Indian/Antananarivo", + "Indian/Chagos", + "Indian/Christmas", + "Indian/Cocos", + "Indian/Comoro", + "Indian/Kerguelen", + "Indian/Mahe", + "Indian/Maldives", + "Indian/Mauritius", + "Indian/Mayotte", + "Indian/Reunion", + "Iran", + "Israel", + "Jamaica", + "Japan", + "Kwajalein", + "Libya", + "MET", + "MST", + "MST7MDT", + "Mexico/BajaNorte", + "Mexico/BajaSur", + "Mexico/General", + "NZ", + "NZ-CHAT", + "Navajo", + "PRC", + "PST8PDT", + "Pacific/Apia", + "Pacific/Auckland", + "Pacific/Bougainville", + "Pacific/Chatham", + "Pacific/Chuuk", + "Pacific/Easter", + "Pacific/Efate", + "Pacific/Enderbury", + "Pacific/Fakaofo", + "Pacific/Fiji", + "Pacific/Funafuti", + "Pacific/Galapagos", + "Pacific/Gambier", + "Pacific/Guadalcanal", + "Pacific/Guam", + "Pacific/Honolulu", + "Pacific/Johnston", + "Pacific/Kiritimati", + "Pacific/Kosrae", + "Pacific/Kwajalein", + "Pacific/Majuro", + "Pacific/Marquesas", + "Pacific/Midway", + "Pacific/Nauru", + "Pacific/Niue", + "Pacific/Norfolk", + "Pacific/Noumea", + "Pacific/Pago_Pago", + "Pacific/Palau", + "Pacific/Pitcairn", + "Pacific/Pohnpei", + "Pacific/Ponape", + "Pacific/Port_Moresby", + "Pacific/Rarotonga", + "Pacific/Saipan", + "Pacific/Samoa", + "Pacific/Tahiti", + "Pacific/Tarawa", + "Pacific/Tongatapu", + "Pacific/Truk", + "Pacific/Wake", + "Pacific/Wallis", + "Pacific/Yap", + "Poland", + "Portugal", + "ROC", + "ROK", + "Singapore", + "Turkey", + "UCT", + "US/Alaska", + "US/Aleutian", + "US/Arizona", + "US/Central", + "US/East-Indiana", + "US/Eastern", + "US/Hawaii", + "US/Indiana-Starke", + "US/Michigan", + "US/Mountain", + "US/Pacific", + "US/Samoa", + "UTC", + "Universal", + "W-SU", + "WET", + "Zulu", + nullptr +}; + +std::vector<std::string> AllTimeZoneNames() { + std::vector<std::string> names; + for (const char* const* namep = kTimeZoneNames; *namep != nullptr; ++namep) { + names.push_back(std::string("file:") + *namep); + } + assert(!names.empty()); + + std::mt19937 urbg(42); // a UniformRandomBitGenerator with fixed seed + std::shuffle(names.begin(), names.end(), urbg); + return names; +} + +cctz::time_zone TestTimeZone() { + cctz::time_zone tz; + cctz::load_time_zone("America/Los_Angeles", &tz); + return tz; +} + +void BM_Zone_LoadUTCTimeZoneFirst(benchmark::State& state) { + cctz::time_zone tz; + cctz::load_time_zone("UTC", &tz); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz)); + } +} +BENCHMARK(BM_Zone_LoadUTCTimeZoneFirst); + +void BM_Zone_LoadUTCTimeZoneLast(benchmark::State& state) { + cctz::time_zone tz; + for (const auto& name : AllTimeZoneNames()) { + cctz::load_time_zone(name, &tz); // prime cache + } + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz)); + } +} +BENCHMARK(BM_Zone_LoadUTCTimeZoneLast); + +void BM_Zone_LoadTimeZoneFirst(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // in case we're first + const std::string name = "file:America/Los_Angeles"; + while (state.KeepRunning()) { + state.PauseTiming(); + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + state.ResumeTiming(); + benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz)); + } +} +BENCHMARK(BM_Zone_LoadTimeZoneFirst); + +void BM_Zone_LoadTimeZoneCached(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + const std::string name = "file:America/Los_Angeles"; + cctz::load_time_zone(name, &tz); // prime cache + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz)); + } +} +BENCHMARK(BM_Zone_LoadTimeZoneCached); + +void BM_Zone_LoadLocalTimeZoneCached(benchmark::State& state) { + cctz::utc_time_zone(); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + cctz::local_time_zone(); // prime cache + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::local_time_zone()); + } +} +BENCHMARK(BM_Zone_LoadLocalTimeZoneCached); + +void BM_Zone_LoadAllTimeZonesFirst(benchmark::State& state) { + cctz::time_zone tz; + const std::vector<std::string> names = AllTimeZoneNames(); + for (auto index = names.size(); state.KeepRunning(); ++index) { + if (index == names.size()) { + index = 0; + } + if (index == 0) { + state.PauseTiming(); + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + state.ResumeTiming(); + } + benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz)); + } +} +BENCHMARK(BM_Zone_LoadAllTimeZonesFirst); + +void BM_Zone_LoadAllTimeZonesCached(benchmark::State& state) { + cctz::time_zone tz; + const std::vector<std::string> names = AllTimeZoneNames(); + for (const auto& name : names) { + cctz::load_time_zone(name, &tz); // prime cache + } + for (auto index = names.size(); state.KeepRunning(); ++index) { + if (index == names.size()) { + index = 0; + } + benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz)); + } +} +BENCHMARK(BM_Zone_LoadAllTimeZonesCached); + +void BM_Zone_TimeZoneImplGetImplicit(benchmark::State& state) { + cctz::time_zone tz; // implicit UTC + cctz::time_zone::Impl::get(tz); + while (state.KeepRunning()) { + cctz::time_zone::Impl::get(tz); + } +} +BENCHMARK(BM_Zone_TimeZoneImplGetImplicit); + +void BM_Zone_TimeZoneImplGetExplicit(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // explicit UTC + cctz::time_zone::Impl::get(tz); + while (state.KeepRunning()) { + cctz::time_zone::Impl::get(tz); + } +} +BENCHMARK(BM_Zone_TimeZoneImplGetExplicit); + +void BM_Zone_UTCTimeZone(benchmark::State& state) { + cctz::time_zone tz; + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::utc_time_zone()); + } +} +BENCHMARK(BM_Zone_UTCTimeZone); + +// In each "ToDateTime" benchmark we switch between two instants +// separated by at least one transition in order to defeat any +// internal caching of previous results (e.g., see local_time_hint_). +// +// The "UTC" variants use UTC instead of the Google/local time zone. + +void BM_Time_ToDateTime_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + std::chrono::system_clock::time_point tp = + std::chrono::system_clock::from_time_t(1384569027); + std::chrono::system_clock::time_point tp2 = + std::chrono::system_clock::from_time_t(1418962578); + while (state.KeepRunning()) { + std::swap(tp, tp2); + tp += std::chrono::seconds(1); + benchmark::DoNotOptimize(cctz::convert(tp, tz)); + } +} +BENCHMARK(BM_Time_ToDateTime_CCTZ); + +void BM_Time_ToDateTime_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + time_t t = 1384569027; + time_t t2 = 1418962578; + struct tm tm; + while (state.KeepRunning()) { + std::swap(t, t2); + t += 1; +#if defined(_WIN32) || defined(_WIN64) + benchmark::DoNotOptimize(localtime_s(&tm, &t)); +#else + benchmark::DoNotOptimize(localtime_r(&t, &tm)); +#endif + } +} +BENCHMARK(BM_Time_ToDateTime_Libc); + +void BM_Time_ToDateTimeUTC_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = cctz::utc_time_zone(); + std::chrono::system_clock::time_point tp = + std::chrono::system_clock::from_time_t(1384569027); + while (state.KeepRunning()) { + tp += std::chrono::seconds(1); + benchmark::DoNotOptimize(cctz::convert(tp, tz)); + } +} +BENCHMARK(BM_Time_ToDateTimeUTC_CCTZ); + +void BM_Time_ToDateTimeUTC_Libc(benchmark::State& state) { + time_t t = 1384569027; + struct tm tm; + while (state.KeepRunning()) { + t += 1; +#if defined(_WIN32) || defined(_WIN64) + benchmark::DoNotOptimize(gmtime_s(&tm, &t)); +#else + benchmark::DoNotOptimize(gmtime_r(&t, &tm)); +#endif + } +} +BENCHMARK(BM_Time_ToDateTimeUTC_Libc); + +// In each "FromDateTime" benchmark we switch between two YMDhms +// values separated by at least one transition in order to defeat any +// internal caching of previous results (e.g., see time_local_hint_). +// +// The "UTC" variants use UTC instead of the Google/local time zone. +// The "Day0" variants require normalization of the day of month. + +void BM_Time_FromDateTime_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + int i = 0; + while (state.KeepRunning()) { + if ((i++ & 1) == 0) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz)); + } else { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2013, 11, 15, 18, 30, 27), tz)); + } + } +} +BENCHMARK(BM_Time_FromDateTime_CCTZ); + +void BM_Time_FromDateTime_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + int i = 0; + while (state.KeepRunning()) { + struct tm tm; + if ((i++ & 1) == 0) { + tm.tm_year = 2014 - 1900; + tm.tm_mon = 12 - 1; + tm.tm_mday = 18; + tm.tm_hour = 20; + tm.tm_min = 16; + tm.tm_sec = 18; + } else { + tm.tm_year = 2013 - 1900; + tm.tm_mon = 11 - 1; + tm.tm_mday = 15; + tm.tm_hour = 18; + tm.tm_min = 30; + tm.tm_sec = 27; + } + tm.tm_isdst = -1; + benchmark::DoNotOptimize(mktime(&tm)); + } +} +BENCHMARK(BM_Time_FromDateTime_Libc); + +void BM_Time_FromDateTimeUTC_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = cctz::utc_time_zone(); + while (state.KeepRunning()) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz)); + } +} +BENCHMARK(BM_Time_FromDateTimeUTC_CCTZ); + +// There is no BM_Time_FromDateTimeUTC_Libc. + +void BM_Time_FromDateTimeDay0_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + int i = 0; + while (state.KeepRunning()) { + if ((i++ & 1) == 0) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 0, 20, 16, 18), tz)); + } else { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2013, 11, 0, 18, 30, 27), tz)); + } + } +} +BENCHMARK(BM_Time_FromDateTimeDay0_CCTZ); + +void BM_Time_FromDateTimeDay0_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + int i = 0; + while (state.KeepRunning()) { + struct tm tm; + if ((i++ & 1) == 0) { + tm.tm_year = 2014 - 1900; + tm.tm_mon = 12 - 1; + tm.tm_mday = 0; + tm.tm_hour = 20; + tm.tm_min = 16; + tm.tm_sec = 18; + } else { + tm.tm_year = 2013 - 1900; + tm.tm_mon = 11 - 1; + tm.tm_mday = 0; + tm.tm_hour = 18; + tm.tm_min = 30; + tm.tm_sec = 27; + } + tm.tm_isdst = -1; + benchmark::DoNotOptimize(mktime(&tm)); + } +} +BENCHMARK(BM_Time_FromDateTimeDay0_Libc); + +const char* const kFormats[] = { + RFC1123_full, // 0 + RFC1123_no_wday, // 1 + RFC3339_full, // 2 + RFC3339_sec, // 3 + "%Y-%m-%dT%H:%M:%S", // 4 + "%Y-%m-%d", // 5 +}; +const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]); + +void BM_Format_FormatTime(benchmark::State& state) { + const std::string fmt = kFormats[state.range(0)]; + state.SetLabel(fmt); + const cctz::time_zone tz = TestTimeZone(); + const std::chrono::system_clock::time_point tp = + cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) + + std::chrono::microseconds(1); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::format(fmt, tp, tz)); + } +} +BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1); + +void BM_Format_ParseTime(benchmark::State& state) { + const std::string fmt = kFormats[state.range(0)]; + state.SetLabel(fmt); + const cctz::time_zone tz = TestTimeZone(); + std::chrono::system_clock::time_point tp = + cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) + + std::chrono::microseconds(1); + const std::string when = cctz::format(fmt, tp, tz); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::parse(fmt, when, tz, &tp)); + } +} +BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1); + +} // namespace diff --git a/absl/time/internal/cctz/src/time_zone_format_test.cc b/absl/time/internal/cctz/src/time_zone_format_test.cc index 6cea0360dd0e..3a5f19ac8b1f 100644 --- a/absl/time/internal/cctz/src/time_zone_format_test.cc +++ b/absl/time/internal/cctz/src/time_zone_format_test.cc @@ -463,8 +463,13 @@ TEST(Format, ExtendedSecondOffset) { EXPECT_TRUE(load_time_zone("Europe/Moscow", &tz)); tp = convert(civil_second(1919, 6, 30, 23, 59, 59), utc); - TestFormatSpecifier(tp, tz, "%E*z", "+04:31:19"); - TestFormatSpecifier(tp, tz, "%Ez", "+04:31"); + if (tz.lookup(tp).offset == 4 * 60 * 60) { + // We're likely dealing with zoneinfo that doesn't support really old + // timestamps, so Europe/Moscow never looks to be on local mean time. + } else { + TestFormatSpecifier(tp, tz, "%E*z", "+04:31:19"); + TestFormatSpecifier(tp, tz, "%Ez", "+04:31"); + } tp += seconds(1); TestFormatSpecifier(tp, tz, "%E*z", "+04:00:00"); } |