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help / color / mirror / Atom feedFrom: Nazir Bilal Yavuz <[email protected]>
To: KAZAR Ayoub <[email protected]>
Cc: Shinya Kato <[email protected]>
Cc: [email protected]
Subject: Re: Speed up COPY FROM text/CSV parsing using SIMD
Date: Tue, 19 Aug 2025 17:14:54 +0300
Message-ID: <CAN55FZ109W90Ux_EBEqkkU2TyNqBNhdhN_1XPRGo3iiZ2L9b=A@mail.gmail.com> (raw)
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Hi,
On Tue, 19 Aug 2025 at 15:33, Nazir Bilal Yavuz <[email protected]> wrote:
>
> I am able to reproduce the regression you mentioned but both
> regressions are %20 on my end. I found that (by experimenting) SIMD
> causes a regression if it advances less than 5 characters.
>
> So, I implemented a small heuristic. It works like that:
>
> - If advance < 5 -> insert a sleep penalty (n cycles).
'sleep' might be a poor word choice here. I meant skipping SIMD for n
number of times.
--
Regards,
Nazir Bilal Yavuz
Microsoft
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Subject: Re: Speed up COPY FROM text/CSV parsing using SIMD
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