[ratorx]

Disclaimer: SRE at Google on a team vaguely related to video CDN stuff, but have no inside knowledge

I don’t think you can dismiss BSD faster than Linux (or make any claims about the relative speed of different OSes) just because big companies run Linux. There are other costs involved and optimisations that can be shared if your edge serving stack is as similar as possible to the non-edge serving stack (that you have many more engineers developing for).

All you can conclude is that with enough optimisation, Linux can be made to perform well enough for it to not be worth replacing (yet). Because replacing Linux would require replicating all the custom software and optimisations made to it for whatever other platform you pick.