Michel Talon
2011-Dec-16 21:44 UTC
Benchmark (Phoronix): FreeBSD 9.0-RC2 vs. Oracle Linux 6.1
O Hartmann says:> For the underlying OS, as far as I know, the compiler hasn't as much > impact as on userland software since autovectorization and other neat > things are not used during system build. > > From my experience using gcc 4.2 or 4.4/4.5 does not have an impact > beyond 3% when SSE isn't explicetly enforced. > > More interesting is the performance gain due to the architecture. I > think it would be very easy for M. Larabel to repeat this benchmark with > a "bleeding edge" Ubuntu or Suse as well. And since FreeBSD 9.0 can be > compiled with CLANG, it should be possible to compare both also with > "bleeding edge" compilers, say FreeBSD 9/CLANG, Ubuntu 12/gcc 4.6.2.My experience is that using gcc 4.6 gives *much* better performance than using the obsolete gcc that is in FreeBSD and much better performance than clang. After all you have to pay the price for stupidities such as being GPL free. Or you can see it otherwise, you can compete on the most GPL free system, or the best working system. As for the ZFS versus ext3 performance, here also if you try to sell FreeBSD on features which are supposed to have extraordinary benefits don't be surprised when testers use these features and find horrendous performance issues. -- Michel Talon talon@lpthe.jussieu.fr