alt Hacker NewsI think software with a strong focus on SIMD really favours x86 over Apple, since AVX2 support was pretty uniform and AVX-512 (except Intel's fiasco) has been supported for a while, while the post-NEON landscape is strange in ARM country.
From what I've been able to gather, Apple only supports SME and the small "streaming" part of SVE2 required by SME since the M4. Which seems to be mostly useless for video encoding (I only see NEON/SVE in https://gitlab.com/AOMediaCodec/SVT-AV1/-/tree/master/Source... or https://github.com/Multicorewareinc/x265/tree/master/source/...) it's basically a GEMM engine.
So basically, video encoding is a bad show for Apple who seem to be saying "use crappy hardware encoding and buy amd64 if you need more".
Very hard to find benchmark data. Found https://openbenchmarking.org/vs/Processor/Apple+M4+Pro,AMD+R... that shows a good x265 performance at 1080p but not 4K. Guess the wider SIMD units matter more there.
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X64 does have a stronger SIMD story, but this is partly compensated for by the fact that ARM64 is much easier to decode wide. M series has a very wide decoder and a lot of instruction level parallelism. It can turn chunks of those 128-bit SIMD operations into what amounts to wider operations.
AVX still wins though.
M series still wins on performance per watt and now apparently leads on general purpose code.
All these leading edge chips are very good. We have an embarrassment of riches when it comes to blistering fast chips here.
> So basically, video encoding is bad show for Apple
Apple has dedicated hardware for video decode and encode for several video formats.
That's why the comparisons between PCs and Macs running video editing software favor the Macs so heavily.