Re: Speed up COPY FROM text/CSV parsing using SIMD

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: Manni Wood <manni(dot)wood(at)enterprisedb(dot)com>
Cc: Nazir Bilal Yavuz <byavuz81(at)gmail(dot)com>, KAZAR Ayoub <ma_kazar(at)esi(dot)dz>, Neil Conway <neil(dot)conway(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Shinya Kato <shinya11(dot)kato(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Speed up COPY FROM text/CSV parsing using SIMD
Date: 2026-02-16 18:15:28
Message-ID: aZNewLWZ4MbrrrLv@nathan
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On Mon, Feb 16, 2026 at 11:04:58AM -0600, Nathan Bossart wrote:
> On Fri, Feb 13, 2026 at 09:34:13PM -0600, Manni Wood wrote:
>> v7-0001 + v7-0002 applied to master certainly seems promising: nice to see
>> speed improvements across the board on both x86 and arm!
>
> Thanks for testing. Based on these results, I think we can abandon 0002,
> at least for now.

Have you tested small rows, i.e., less than 16 bytes per row? I'm
wondering if that regresses at all.

--
nathan

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