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FFmpeg devs boast of up to 94x performance boost after implementing handwritten AVX-512 assembly code (www.tomshardware.com)

submitted 3 weeks ago by [email protected] to c/[email protected]

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Unfortunately, due to the complexity and specialized nature of AVX-512, such optimizations are typically reserved for performance-critical applications and require expertise in low-level programming and processor microarchitecture.

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[–] [email protected] 3 points 3 weeks ago (1 children)

Though you'd get the same speedup if you used SIMD intrinsics. This is just comparing non-SIMD to SIMD.

[–] [email protected] 2 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

from the article it's not clear what the performance boost is relative to intrinsics (its extremely unlikely to be anything close to 94x lol), its not even clear from the article if the avx2 implementation they benchmarked against was instrinsics or handwritten either. in some cases avx2 seems to slightly outperform avx-512 in their implementation

there's also so many different ways to break a problem down that i'm not sure this is an ideal showcase, at least without more information.

to be fair to the presenters they may not be the ones making the specific flavour of hype that the article writers are.