On Thu, 18 Jan 2018, Carl Eugen Hoyos wrote:
2018-01-18 1:03 GMT+01:00 Marton Balint <c...@passwd.hu>:
Blend function speedups on x86_64 Core i5 4460:
ffmpeg -f lavfi -i allyuv -vf framerate=60:threads=1 -f null none
C: 447548411 decicycles in Blend, 2048 runs, 0 skips
SSSE3: 130020087 decicycles in Blend, 2048 runs, 0 skips
AVX2: 128508221 decicycles in Blend, 2048 runs, 0 skips
ffmpeg -f lavfi -i allyuv -vf format=yuv420p12,framerate=60:threads=1 -f null
none
C: 228932745 decicycles in Blend, 2048 runs, 0 skips
SSE4: 123357781 decicycles in Blend, 2048 runs, 0 skips
AVX2: 121215353 decicycles in Blend, 2048 runs, 0 skips
Is the avx2 version really useful?
Well, it _is_ faster, even if the speedup is not significant. The ASM code
is almost the same, so almost no maitenance burden is invovled in keeping
both.
Regards,
Marton
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