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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.c
Subject: Re: realloc() - frequency, conditions, or experiences about
 relocation?
Date: Mon, 24 Jun 2024 08:40:03 -0000 (UTC)
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On Fri, 21 Jun 2024 21:12:12 +0200, Bonita Montero wrote:

> Usually you don't resize the block with a few bytes ...

The usual way I use realloc is to maintain separate counts of the number 
of array elements I have allocated, and the number I am actually using. A 
realloc call is only needed when the latter hits the former. Every time I 
call realloc, I will extend by some minimum number of array elements (e.g. 
128), roughly comparable to the sort of array size I typically end up 
with.

And then when the structure is complete, I do a final realloc call to 
shrink it down so the size is actually that used. Is it safe to assume 
such a call will never fail? Hmm ...