Re: vectorized CRC on ARM64

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: John Naylor <johncnaylorls(at)gmail(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: vectorized CRC on ARM64
Date: 2026-04-07 13:55:11
Message-ID: adUMv-fTkE1YarHg@nathan
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On Tue, Apr 07, 2026 at 05:02:04PM +0700, John Naylor wrote:
> Attached is how that would look. The idea is that small inputs will
> encounter fewer branches. It'd be tricky to prove a difference with a
> benchmark, and I see this as just making the small-input path more
> similar to PG 18, as a risk-avoidance maneuver.

Seems fine to me. I believe we do similar things elsewhere.

--
nathan

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