ydb/util/datetime/systime.cpp, branch get_cmakelists2Mirror of YDB github reposhttps://code.mastervirt.ru/ydb/atom?h=get_cmakelists22023-05-04T07:28:45ZRemove using of extra semicolons in util2023-05-04T07:28:45Zbulatmanbulatman@yandex-team.com2023-05-04T07:28:45Zurn:sha1:6bccf8a6c51dfc4e563317584ee71ea0637c452aspeedup 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 <levong@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:51:45Zlevonglevong@yandex-team.ru2022-02-10T13:51:45Zurn:sha1:dd80ec62c76c5c848197b5b7468e6e215e59d715Restoring authorship annotation for <levong@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:51:45Zlevonglevong@yandex-team.ru2022-02-10T13:51:45Zurn:sha1:5a1d870a044e6a0fc52fe457c2a6055181cf7438Restoring 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 <dobrokot@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:49:07Zdobrokotdobrokot@yandex-team.ru2022-02-10T13:49:07Zurn:sha1:8d57b69dee81198a59c39e64704f7dc9f04b4fbfRestoring authorship annotation for <dobrokot@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:49:07Zdobrokotdobrokot@yandex-team.ru2022-02-10T13:49:07Zurn:sha1:25d83bf841d8b3ce3886525078f1964ac3c293c5Restoring authorship annotation for <ivanselin@yandex-team.ru>. Commit 2 of 2.2022-02-10T13:48:40Zivanselinivanselin@yandex-team.ru2022-02-10T13:48:40Zurn:sha1:e84d04727ac10dd27e5dc3d72039544902f81288Restoring authorship annotation for <ivanselin@yandex-team.ru>. Commit 1 of 2.2022-02-10T13:48:40Zivanselinivanselin@yandex-team.ru2022-02-10T13:48:40Zurn:sha1:496663edd3beee611468aedd4bb9ac100c1a118d