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From: Tom Lane <[email protected]>
To: Ranier Vilela <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: Bertrand Drouvot <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: [email protected]
Subject: Re: define pg_structiszero(addr, s, r)
Date: Mon, 28 Oct 2024 11:08:31 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAEudQAq_D5edSnAy2y0Viuk9Y53LTR=FOu8240SSDWmSm_ToAA@mail.gmail.com>
References: <[email protected]>
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	<[email protected]>
	<CAEudQAq_D5edSnAy2y0Viuk9Y53LTR=FOu8240SSDWmSm_ToAA@mail.gmail.com>

Ranier Vilela <[email protected]> writes:
> It seems to me that [reversing the loop direction] is more optimized.

That's far from clear: you're ignoring the possibility that memory
access logic is better optimized for forward scanning than reverse
scanning.  I'd stick with the forward scan without some extremely
detailed testing.

			regards, tom lane

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