Re: Raw parse tree is not dumped to log
От | Tatsuo Ishii |
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Тема | Re: Raw parse tree is not dumped to log |
Дата | |
Msg-id | 20250903.105729.896425663189147106.ishii@postgresql.org обсуждение исходный текст |
Ответ на | Re: Raw parse tree is not dumped to log (John Naylor <johncnaylorls@gmail.com>) |
Ответы |
Re: Raw parse tree is not dumped to log
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Список | pgsql-hackers |
> The individual runs have quite a bit of variation. It's a known behavior of pgbench. > It's good to cross check results against known facts. If my napkin > math is right, a ~1% speedup for ~60ktps/s amounts to saving ~160ns > per query. It's not plausible that forcing the compiler's hand for > this branch would save several hundred clock cycles. > > To be fair I tried to reproduce and found only noise-level differences: > master: 61553 > case 1: 61423 > case 2: 61647 That's 0.3% difference, definitely noise-level. Ok, I withdraw my claim and commit the patch without unlikely(). Best regards, -- Tatsuo Ishii SRA OSS K.K. English: http://www.sraoss.co.jp/index_en/ Japanese:http://www.sraoss.co.jp
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