On Mon, Jun 10, 2024 at 03:56:46PM +0300, Rémi Denis-Courmont wrote: > > > Le 10 juin 2024 14:57:29 GMT+03:00, Michael Niedermayer > <mich...@niedermayer.cc> a écrit : > >Also we have alpha fate clients: > >https://fate.ffmpeg.org/?query=subarch:alpha%2F%2F > > Are there? I only see Ubuntu 22.04 builds which must be cross-compiled since > Ubuntu 22.04 doesn't support DEC Alpha, not even as a port. > > So I guess the tests are run on user-mode QEMU? For the sake of the argument > and to answer your performance question, SIMD on QEMU is in my experience > much *slower* than scalar C, due to limitations of TCG. So if that's the goal > post, then removing the optimisations is actually a performance win.
My performance question was not related to the fate clients. (though they could be affected too) As i wrote "(this allows users to judge if they want to stay on a old ffmpeg with these optimizations or upgrade)" The fate clients are not real users nor am i thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Asymptotically faster algorithms should always be preferred if you have asymptotical amounts of data
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