ydb/util/datetime/base_ut.cpp, branch oidc-1.2.5-devMirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=oidc-1.2.5-dev2025-02-18T04:41:34Z[util] speedup GmTimeR outside LUT interval2025-02-18T04:41:34Ztobotobo@yandex-team.com2025-02-18T04:25:33Zurn:sha1:b9824e1dc11c30a60d6416b9d345758bc7901544
commit_hash:d57be220df393c193619ef5ed129ec4436540629
FixNamespaceComments in /util2024-09-05T17:17:10Zdmasloffdmasloff@yandex-team.com2024-09-05T17:05:47Zurn:sha1:74184a40c15dc0649a769d9754d0ce7efb44db04
FixNamespaceComments in /util
bb9152570d7c258798644ead5a59f604de05ef3b
Remove Y_UNIT_TEST from config.clang-format2024-08-30T17:16:45Zdmasloffdmasloff@yandex-team.com2024-08-30T16:55:50Zurn:sha1:d1833df14252315c0719e3cc9fccf3c85bce2811
Remove Y_UNIT_TEST from config.clang-format
853b6da2c4464342d4cfe7756c18ed599004fdd8
Set SpacesInLineCommentPrefix to 1 in /util2024-08-17T20:43:45Zdmasloffdmasloff@yandex-team.com2024-08-17T20:33:42Zurn:sha1:69340f4614e853b9319df4b454ab7497711ee3cd
Set SpacesInLineCommentPrefix to 1 in /util
3853f9ec5143722c1bebd8dc0ffc9b61a6c17657
Intermediate changes2024-04-23T12:14:31Zrobot-pigletrobot-piglet@yandex-team.com2024-04-23T11:58:37Zurn:sha1:e378d50b00432742f25d9f84f19ff6d513a457d8speedup GmTimeR function2022-08-25T04:36:11Ztobotobo@yandex-team.com2022-08-25T04:36:11Zurn:sha1:62b3eaa578ea03c63d0fd1ee409e13e360b1ab93
в профиле перфа Маркетного репорта постоянно вижу GmTimeR
там в цикле вычитается по количеству дней в году и прибавляется по 1 году с 1970 по 2022 на каждый вызов
В Маркете проблема стреляла и раньше
в последней итерации функция становится на ~~30% быстрее системной gmtime_r
%%
----------- GmTimeR ---------------
samples: 20691
iterations: 264304536
iterations hr: 264M
run time: 5.002055225
per iteration: 39.85866484 cycles
----------- gmtime_r ---------------
samples: 17452
iterations: 188034528
iterations hr: 188M
run time: 5.001259884
per iteration: 56.96146577 cycles
%%
текущая верся почти в 2 раза медленнее системной:
%%
----------- GmTimeR ---------------
samples: 12760
iterations: 100514931
iterations hr: 101M
run time: 5.00096133
per iteration: 105.4334174 cycles
----------- gmtime_r ---------------
samples: 17667
iterations: 192697896
iterations hr: 193M
run time: 5.001356603
per iteration: 55.69031415 cycles
%%Restoring authorship annotation for <hippskill@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:50:12Zhippskillhippskill@yandex-team.ru2022-02-10T13:50:12Zurn:sha1:bd077d09a08e659195376ee97dc24728bb554246Restoring authorship annotation for <hippskill@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:50:12Zhippskillhippskill@yandex-team.ru2022-02-10T13:50:12Zurn:sha1:6362c4a2681cc317ffd22633d773f02de0d13697Restoring authorship annotation for <prout@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:49:43Zproutprout@yandex-team.ru2022-02-10T13:49:43Zurn:sha1:d2247f243d31adde8feb765324e40c83c5a90999Restoring authorship annotation for <prout@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:49:42Zproutprout@yandex-team.ru2022-02-10T13:49:42Zurn:sha1:7b7fa28b9099b7adca890459a699c6ba5eeff4ca