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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: "undefined behavior"?
Date: Thu, 13 Jun 2024 16:47:30 -0700
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David Brown <david.brown@hesbynett.no> writes:
[...]
>       Certainly "-O3" is rarely worth it unless you are also using a
> "-march=" flag (such as "-fmarch=native") to tune for a particular
> processor and enable stuff like vectorisation.  Getting the fastest
> code is more of an art than a science!

Typo: it's "-march=native".

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */