Re: Raw parse tree is not dumped to log

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От Tatsuo Ishii
Тема Re: Raw parse tree is not dumped to log
Дата
Msg-id 20250903.105729.896425663189147106.ishii@postgresql.org
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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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> 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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