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Build x264-devel with asm enabled? #147
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They use an older version which we also previously enabled asm for. I'll see if I can get some time to fix the assembly in the newer release that we use.
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Currently x264-devel is built with
--disable-asm
I built a version with asm enabled and got a 4x speed increase (admittedly a different x264 version and newer gcc). The output file didn’t have any visible artifacts.
If I understand the following link correctly OpenIndiana also builds x264 with asm enabled.
https://github.com/OpenIndiana/oi-userland/blob/oi/hipster/components/encumbered/x264/Makefile