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From: Bonita Montero <Bonita.Montero@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: realloc() - frequency, conditions, or experiences about
 relocation?
Date: Mon, 17 Jun 2024 14:18:17 +0200
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Am 17.06.2024 um 14:15 schrieb David Brown:

> Consider your target audience and their hardware, the target OS, and the 
> realistic size of your data.  If the target is a PC, you can happily 
> malloc tens of MB at the start without a care, and for systems that do 
> not actually allocate system memory until you try to access the area, 
> there is no cost to this.

If you have a memcpy() from a to b at the end there's twice the memory
allocated even if the destination pages are assigned while touching a
page.