FFmpeg developers have successfully implemented a handwritten AVX-512 assembly code path, resulting in up to 94 times faster performance compared to standard implementations. This optimization is particularly valuable for users running on high-performance hardware capable of executing AVX-512 instructions.
The improvement comes from leveraging the AVX-512 instruction set’s ability to process large chunks of data in parallel using 512-bit registers. This enables significant acceleration of compute-heavy tasks, such as video and image processing.
However, this development is hindered by Intel’s recent disabling of AVX-512 for its Core 12th, 13th, and 14th Generations of Core processors. AMD’s Ryzen 9000-series CPUs remain capable of executing AVX-512 instructions.
This optimization typically requires expertise in low-level programming and processor microarchitecture. While it may not be the go-to solution, it can provide impressive results when performance matters and an area is slow.
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Source: https://www.tomshardware.com/pc-components/cpus/ffmpeg-devs-boast-of-up-to-94x-performance-boost-after-implementing-handwritten-avx-512-assembly-code