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FFmpeg's costly functions are all written in hand optimised assembly (twitter.com)

submitted 1 year ago by [email protected] to c/[email protected]

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[–] [email protected] 13 points 1 year ago (2 children)

What happens if you go from x86 to ARM or whatever? Do they have fallbacks or other separate implementations, then? I mostly do high level languages so I'm not that familiar with microoptimization.

[–] [email protected] 15 points 1 year ago

Looks like it's also done for ARM. https://twitter.com/FFmpeg/status/1710970016777052326

[–] Ledivin 9 points 1 year ago* (last edited 1 year ago)

It would have to be different implementations for different architectures, and so almost definitely have a C-based fallback