Re: Optimize UUID parse using SIMD

> On Aug 18, 2026, at 06:20, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
>>>>
>>>
>>> I don't think the scan can be really unbounded. string_to_uuid()
>>> receives a cstring, so by the time it is called the caller has already
>>> walked or copied the whole string to produce it. So unless the
>>> unbounded scan can be reached in some path I have overlooked, I'd
>>> prefer to keep strlen() here. Happy to change it if you still think it
>>> is worth it.
>>
>> After more thoughts, while I still don't think the scan can be
>> unbounded, using strlen() would add an extra scan just to determine we
>> use hex_decode_safe(). I'll change it to use strnlen() instead.
>
> I've updated the patch accordingly. Please review it.
>
> Regards,
>
> --
> Masahiko Sawada
> Amazon Web Services: https://aws.amazon.com
> <v5-0001-Optimize-UUID-parse-using-SIMD.patch>

Thanks for updating the patch. V5 looks good to me.

Best regards,
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/