Horton

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

Nathan Bossart <nathandbossart@gmail.com>

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From: Nathan Bossart <nathandbossart@gmail.com>
To: "Devanga.Susmitha@fujitsu.com" <Devanga.Susmitha@fujitsu.com>
Cc: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "Chiranmoy.Bhattacharya@fujitsu.com" <Chiranmoy.Bhattacharya@fujitsu.com>, "Ragesh.Hajela@fujitsu.com" <Ragesh.Hajela@fujitsu.com>
Date: 2025-01-09T18:25:51Z
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 →

  1. Optimize hex_encode() and hex_decode() using SIMD.

  2. Speed up hex_encode with bytewise lookup

On Thu, Jan 09, 2025 at 11:22:05AM +0000, Devanga.Susmitha@fujitsu.com wrote:
> This email aims to discuss the contribution of optimized hex_encode and
> hex_decode functions for ARM (aarch64) machines. These functions are
> widely used for encoding and decoding binary data in the bytea data type.

Thank you for sharing this work!  I'm not able to review this in depth at
the moment, but I am curious if you considered trying to enable
auto-vectorization on the code or using the higher-level SIMD support in
src/include/port/simd.h.  Those may not show as impressive of gains as your
patch, but they would likely require much less code and apply to a wider
set of architectures.

-- 
nathan