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Subject: Re: optimize lookups in snapshot [sub]xip arrays
From: Zhang Mingli <zmlpostgres@gmail.com>
In-Reply-To: <20220725190419.GA4095199@nathanxps13>
Date: Tue, 26 Jul 2022 09:50:07 +0800
Cc: Andres Freund <andres@anarazel.de>,
 John Naylor <jcnaylor@gmail.com>,
 pgsql-hackers@postgresql.org
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References: <20220713170950.GA3116318@nathanxps13>
 <20220715200857.nm2gc4weixwlwbnx@awork3.anarazel.de>
 <20220717035957.GA3631071@nathanxps13> <20220725190419.GA4095199@nathanxps13>
To: Nathan Bossart <nathandbossart@gmail.com>
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 <https://www.postgresql.org/message-id/CA348268-184A-431D-8F89-53D76B44CE91%40gmail.com>
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> On Jul 26, 2022, at 03:04, Nathan Bossart <nathandbossart@gmail.com> =
wrote:
>>=20
> =46rom the discussion thus far, it seems there is interest in =
optimizing
> [sub]xip lookups, so I'd like to spend some time moving it forward.  I
> think the biggest open question is which approach to take.  Both the =
SIMD
> and hash table approaches seem viable, but I think I prefer the SIMD
> approach at the moment (see the last paragraph of quoted text for the
> reasons).  What do folks think?
>=20
> --=20
> Nathan Bossart
> Amazon Web Services: https://aws.amazon.com
>=20
>=20

+1, I=E2=80=99m not familiar with SIMD, will try to review this patch.


Regards,
Zhang Mingli