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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: That depends... (Was: Regarding assignment to struct)
Date: Sun, 04 May 2025 11:05:21 -0700
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Kaz Kylheku <643-408-1753@kylheku.com> writes:

> On 2025-05-03, Lew Pitcher <lew.pitcher@digitalfreehold.ca> wrote:
>
>> If it is legal, then why isn't it used more often?  Is it a readability/
>> maintainability issue, or is it something else?
>
> It's not used more often because
>
> - programmers are irrationallyafraid that there will be lots of
>   overhead when the structure gets large.
>
>   (In fact, passing large structs by value is implemented
>   using a hidden pointer;  a copy is not made unless the calee
>   modifies the parameter.

It appears that this statement doesn't hold under gcc
or clang.