Re: [PATCH] Hex-coding optimizations using SVE on ARM.

John Naylor <johncnaylorls@gmail.com>

From: John Naylor <johncnaylorls@gmail.com>

To: Nathan Bossart <nathandbossart@gmail.com>

Cc: "Chiranmoy.Bhattacharya@fujitsu.com" <Chiranmoy.Bhattacharya@fujitsu.com>, Tom Lane <tgl@sss.pgh.pa.us>, David Rowley <dgrowleyml@gmail.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "Devanga.Susmitha@fujitsu.com" <Devanga.Susmitha@fujitsu.com>, "Ragesh.Hajela@fujitsu.com" <Ragesh.Hajela@fujitsu.com>

Date: 2025-10-03T07:36:47Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Optimize hex_encode() and hex_decode() using SIMD.
- ec8719ccbfcd 19 (unreleased) landed
Speed up hex_encode with bytewise lookup
- e24d77080b36 18.0 landed

On Fri, Oct 3, 2025 at 12:33 AM Nathan Bossart <nathandbossart@gmail.com> wrote:
> [v13]

LGTM, but I went back and checked if vector8_zero() actually does
anything different than vector8_boadcast(0), and in fact it doesn't on
compilers we support for either x86 or Arm. I pulled the former out
from older work, but it seems irrelevant now. Pardon the noise.

-- 
John Naylor
Amazon Web Services