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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Tim Rentsch <tr.17687@z991.linuxsc.com> Newsgroups: comp.lang.c++ Subject: Re: constexpr is really very smart! Date: Sun, 22 Dec 2024 17:17:41 -0800 Organization: A noiseless patient Spider Lines: 26 Message-ID: <86wmfrdwp6.fsf@linuxsc.com> References: <vjndub$2glcu$1@paganini.bofh.team> <20241216112808.00003f74@yahoo.com> <86jzbyghdw.fsf@linuxsc.com> <20241218013342.0000518a@yahoo.com> <867c7whol9.fsf@linuxsc.com> <20241218220006.00003f8e@yahoo.com> <86v7vgf3tb.fsf@linuxsc.com> <20241219234549.00001902@yahoo.com> <86r062f0kl.fsf@linuxsc.com> <20241222001456.00007e84@yahoo.com> <865xnbftyi.fsf@linuxsc.com> <20241223000503.00006d1d@yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Date: Mon, 23 Dec 2024 02:17:42 +0100 (CET) Injection-Info: dont-email.me; posting-host="175d13363d069c69169282e3d646d5d4"; logging-data="935447"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/7f48AivyI+WRaL46AegMnO3mjRJqiQOQ=" User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux) Cancel-Lock: sha1:rF8mPbtNOhKjleEe9xYtMVhQ6qc= sha1:HbMV4NpgyAfZ7OZnd5TbRyRtogU= Bytes: 2225 Michael S <already5chosen@yahoo.com> writes: > 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(). Yes I saw that.