// 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
