Horton

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

Tom Lane <tgl@sss.pgh.pa.us>

View thread
From: Tom Lane <tgl@sss.pgh.pa.us>
To: John Naylor <johncnaylorls@gmail.com>
Cc: Nathan Bossart <nathandbossart@gmail.com>, "Chiranmoy.Bhattacharya@fujitsu.com" <Chiranmoy.Bhattacharya@fujitsu.com>, "Devanga.Susmitha@fujitsu.com" <Devanga.Susmitha@fujitsu.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "Ragesh.Hajela@fujitsu.com" <Ragesh.Hajela@fujitsu.com>
Date: 2025-01-14T05:59:04Z
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

John Naylor <johncnaylorls@gmail.com> writes:
> We can do about as well simply by changing the nibble lookup to a byte
> lookup, which works on every compiler and architecture:

I didn't attempt to verify your patch, but I do prefer addressing
this issue in a machine-independent fashion.  I also like the brevity
of the patch (though it could do with some comments perhaps, not that
the existing code has any).

			regards, tom lane