Michael Larabel of Phoronix recently ran some benchmark tests, comparing FreeBSD & PC-BSD 10.3 with Linux. He tests everything from database benchmarks to the compiler. See the detailed results in the link below.
With FreeBSD 10.3 having been released followed by the desktop-oriented PC-BSD 10.3 release that’s running rather nicely, I decided to run some open-source performance benchmarks atop PC-BSD 10.3 x64 compared to various Linux distributions.
Originally I also aimed to run some PC-BSD vs. Linux gaming tests using the updated Linux binary compatibility layer in FreeBSD 10.3’s kernel, but sadly, that didn’t pan out. As noted in the aforelinked article, I’ve been running into a variety of issues that made my usual test candidates not run on PC-BSD 10.3 with either the x86 or x86_64 Linux binaries. If you want to see my old tests, there is FreeBSD: A Faster Platform For Linux Gaming Than Linux? from a few years ago.