ydb/util/datetime/base_ut.cpp, branch 24.1.1Mirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=24.1.12022-08-25T04:36:11Zspeedup 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:sha1:7b7fa28b9099b7adca890459a699c6ba5eeff4caRestoring authorship annotation for <lapshov@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:49:39Zlapshovlapshov@yandex-team.ru2022-02-10T13:49:39Zurn:sha1:1ef52da9919aaa7ec7e3c51da7fdaa637ab133b7Restoring authorship annotation for <lapshov@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:49:39Zlapshovlapshov@yandex-team.ru2022-02-10T13:49:39Zurn:sha1:4f36f44b1e216dca1f44ada8d126e7b70f05da2fRestoring authorship annotation for <svshevtsov@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:49:37Zsvshevtsovsvshevtsov@yandex-team.ru2022-02-10T13:49:37Zurn:sha1:de89752358147d7b25ef59a85b431bb564068a49Restoring authorship annotation for <svshevtsov@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:49:37Zsvshevtsovsvshevtsov@yandex-team.ru2022-02-10T13:49:37Zurn:sha1:657337012a264721d58c470b4e9e796611f3c492Restoring authorship annotation for <kimkim@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:49:28Zkimkimkimkim@yandex-team.ru2022-02-10T13:49:28Zurn:sha1:10807864acf73d00f425a23b442aac2cf34403a8