Re: [PoC] Improve dead tuple storage for lazy vacuum

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От Andres Freund
Тема Re: [PoC] Improve dead tuple storage for lazy vacuum
Дата
Msg-id 20220627152649.3vt6w5qivanilb3m@alap3.anarazel.de
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Ответ на Re: [PoC] Improve dead tuple storage for lazy vacuum  (John Naylor <john.naylor@enterprisedb.com>)
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Hi,

On 2022-06-27 18:12:13 +0700, John Naylor wrote:
> Another thought: for non-x86 platforms, the SIMD nodes degenerate to
> "simple loop", and looping over up to 32 elements is not great
> (although possibly okay). We could do binary search, but that has bad
> branch prediction.

I'd be quite quite surprised if binary search were cheaper. Particularly on
less fancy platforms.

- Andres



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