for instance benches where OpenSolaris used gcc v3.2 in 32bit mode vs Linux gcc 4.3 in 64bit mode, but such is life. If Solaris people could tailor the compiler, vs Linux people it would be more fair. But not many people has that expertise.
Btw. Kebabbert is a troll who's trolling not only at Phoronix and who's cross-posting (he wrote similar or even exactly the same things at Phoronix):
What a performance monster slowlaris is (by Kebabbert):