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is Wine with -O3 and -march=native a placebo?
(lemmygrad.ml)
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It fully depends on the code. If the code in question does not do the kinds of calculations that can benefit from SIMD instructions,
march=native
will do absolutely nothing for you, no matter how special or new your CPU might be.I doubt WINE does many things that would benefit from SIMD but the only way to know for sure is to test it out.