On Mon, Feb 23, 2026 at 3:10 AM Nazir Bilal Yavuz <byavuz81@gmail.com> wrote:
Hi,

On Fri, 20 Feb 2026 at 21:15, Nathan Bossart <nathandbossart@gmail.com> wrote:
>
> Yeah, the couple of small regressions seem close to (or below) the noise
> level, and IIUC yours were the only benchmarks that showed them, anyway.
> Plus, I think we'll need this change regardless as a prerequisite for the
> SIMD work.
>
> > Thank you both for the benchmarks. Results look good to me!
>
> Committed that part.

Thank you! Attaching the SIMD patch only.

--
Regards,
Nazir Bilal Yavuz
Microsoft

Hello!

I ran some speed tests on Nazir's v10 SIMD-only patch. I'm a bit surprised at the regression for x86 with wide rows for the 1/3rd special characters scenarios. I'm hoping it's something I did wrong. If anyone else has numbers to share, that would be excellent.

x86 NARROW master 50,000,000 rows
TXT :                 26359.319000 ms
CSV :                 25661.199750 ms
TXT with 1/3 escapes: 28170.085250 ms
CSV with 1/3 quotes:  32638.147500 ms

x86 NARROW v10 50,000,000 rows
TXT :                 26416.331500 ms  -0.216290% regression
CSV :                 25318.727500 ms  1.334592% improvement
TXT with 1/3 escapes: 28608.007500 ms  -1.554565% regression
CSV with 1/3 quotes:  32805.627750 ms  -0.513143% regression

x86 WIDE master 500,000 rows
TXT :                 26475.164250 ms
CSV :                 31963.478500 ms
TXT with 1/3 escapes: 29671.120750 ms
CSV with 1/3 quotes:  40391.616250 ms

x86 WIDE v10 500,000 rows
TXT :                 23067.046750 ms  12.872885% improvement
CSV :                 23259.092250 ms  27.232287% improvement
TXT with 1/3 escapes: 31796.098250 ms  -7.161770% regression
CSV with 1/3 quotes:  42925.792250 ms  -6.274015% regression



arm NARROW master 25,000,000 rows
TXT :                 10077.096250 ms
CSV :                 10310.671250 ms
TXT with 1/3 escapes: 9893.155000 ms
CSV with 1/3 quotes:  12133.064750 ms

arm NARROW v10 25,000,000 rows
TXT :                 10467.816750 ms  -3.877312% regression
CSV :                 9986.288000 ms  3.146092% improvement
TXT with 1/3 escapes: 10323.173750 ms  -4.346629% regression
CSV with 1/3 quotes:  11843.611750 ms  2.385654% improvement

arm WIDE master 250,000 rows
TXT :                 10568.344750 ms
CSV :                 13046.610500 ms
TXT with 1/3 escapes: 12193.088500 ms
CSV with 1/3 quotes:  16629.319000 ms

arm WIDE v10 250,000 rows
TXT :                 9064.959000 ms  14.225366% improvement
CSV :                 9019.553250 ms  30.866693% improvement
TXT with 1/3 escapes: 12344.497250 ms  -1.241759% regression
CSV with 1/3 quotes:  15495.863750 ms  6.816005% improvement

--
-- Manni Wood EDB: https://www.enterprisedb.com