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

From: "Greg Burd" <greg(at)burd(dot)me>
To: "Nathan Bossart" <nathandbossart(at)gmail(dot)com>, "Nazir Bilal Yavuz" <byavuz81(at)gmail(dot)com>
Cc: "Manni Wood" <manni(dot)wood(at)enterprisedb(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>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Speed up COPY FROM text/CSV parsing using SIMD
Date: 2026-03-13 17:22:25
Message-ID: e4b51a1d-59e7-4ab5-98a1-c90a0cb27349@app.fastmail.com
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On Fri, Mar 13, 2026, at 12:16 PM, Nathan Bossart wrote:
> On Fri, Mar 13, 2026 at 07:14:06PM +0300, Nazir Bilal Yavuz wrote:
>> On Fri, 13 Mar 2026 at 18:29, Greg Burd <greg(at)burd(dot)me> wrote:
>>> I also created a few tests (attached) to check boundary conditions, I
>>> might add some along with the RISC-V work.
>>
>> Thank you for the tests! I have checked them and the output is the
>> same on both v17 and master. Do you think it would make sense to add
>> them as regression tests?
>
> Seems like a good idea. I was curious what the test coverage looked like
> without extra tests. Once there's a report, we could choose a subset of
> these to close any gaps.

+1, you said it better than I did! :)

> --
> nathan

best.

-greg

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