On Tue, Mar 31, 2026 at 12:40 AM [email protected] <[email protected]> wrote: > > On Tue, Mar 31, 2026 at 1:28 PM Zuxy Meng via ffmpeg-devel > <[email protected]> wrote: > > > > From: zuxy <[email protected]> > > > > More about deprecating MMX than any performance gain; nearly identical > > performance numbers on my Zen 4 (1.36x vs c), but llvm-mca predicts > Does the performance gain stem solely from the removal of MMX or from > the addition of SSE2?
On my Zen 4, sse2 ~= mmxext ~= 1.36x vs c; on Intel newer than Skylake, mmxext should still be faster than c, but sse2 (as per llvm-mca) will be ~1.6x vs mmxext. > > >60% perf gain on Intel CPUs newer than Skylake. _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
