Off-Topic > Off-Topic - Tiny Core Lounge

FFmpeg swscale Rewrite Begins Landing With (2.6x - 254x) Faster

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nick65go:
https://www.phoronix.com/news/FFmpeg-swscale-Rewrite-Landing
This swscale rewrite is less dependent upon compiler auto vectorization and introduced a new x86 SIMD back-end.
Niklas Haas reported that the single-threaded code was 2.1x faster overall and as much as 40.3x faster.
For the multi-threaded usage it was 2.6x faster overall and as much as 254x faster!

Also, from that forum: "hand crafted assembler will always be faster than compiler optimized code and no programmer worth his salt that really cares about performance would rely on compiler optimizations."

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