To add to that, if you need the (max ~30%) performance boost (less on OpenBSD as a some parts of the kernel are still poorly performant in SMP scenarios, it's i

To add to that, if you need the (max ~30%) performance boost (less on OpenBSD as a some parts of the kernel are still poorly performant in SMP scenarios, it's improving but still noticeable), it's possible to enable hyperthreading temporarily via doas sysctl hw.smt=1 I do this occasionally when running larger compilations (LLVM or similar). If you want it enabled permanently you can add hw.smt=1 to /etc/sysctl.conf