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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c++
Subject: Re: constexpr is really very smart!
Date: Mon, 23 Dec 2024 00:05:03 +0200
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On Sun, 22 Dec 2024 10:33:57 -0800
Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:

> Michael S <already5chosen@yahoo.com> writes:
> 
> > On Fri, 20 Dec 2024 14:31:54 -0800
> > Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:
> >  
> >> Thank you for that.  Sadly I am not able to run it because my
> >> test environment is lacking _rdtsc(), and I haven't been able
> >> to find out how to install it.  
> >
> > Any x86-64 Linux should have _rdtsc() as inline function (or
> > built-in) defined in x86intrin.h.  No installation required.  
> 
> Okay.  As it turns out knowing that doesn't help me, but thank
> you for the info.  I'm taking this as a sign from heaven that
> I should be spending my energies somewhere other than measuring
> performance.
> 

Did you see correction of James Kuyper? 
Under Linux it is called __rdtsc().