My understanding is that the kernels are mostly equal. I’d be pretty surprised if one had a large impact one way or the other. Any differences I’d chalk up to the userspace program running it.
replyDon’t forget there are serious hardware differences. It’s not apples to apples.
replyBut that’s ok. The author isn’t claiming FreeBSD is way better than Linux. It’s just a comparison of what he had vs what he has now.
Show me those benchmarks
replyFrom every benchmark I've seen so far, Linux has always been faster than the BSDs.
replyFor example, look at these benchmarks from 2003[1]. The newest benchmarks I could find[2], [3] point in the same direction.
[1] http://bulk.fefe.de/scalability/
[2] https://matteocroce.it/blog/freebsd_linux_networking/
[3] https://www.phoronix.com/review/freebsd-15-amd-epyc-linux