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A comment on FFmpeg devs boast of another 100x leap thanks to handwritten assembly code. Parent comment

Re:FFmpeg devs boast of another 100x leap thanks to handwrit... by saati on Sunday July 20, 2025 @10:11PM (#44631166)
The AVX2 version was still 64x faster than the C one, so AVX-512 is just 50% improvement over that. Hand vectorized assembly is very much the key to the gains.
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Re:FFmpeg devs boast of another 100x leap thanks to handwrit... by brigade on Sunday July 20, 2025 @10:53PM (#44631357)
The only material difference AVX2 makes is that it can't saturate L1 bandwidth. Which would imply that 100x for AVX-512 is only for frames that fit within L1.

And... yep, the benchmark on 256x16 frames. [1]

[1] https://ffmpeg.org/pipermail/ffmpeg-devel/2025-July/346729.h...

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