Mike A. Harris wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > King InuYasha wrote: > >> Except, that could be false advertising. In most cases, where CPU >> computation is not used heavily, 64-bit is actually SLOWER than the >> 32-bit counterpart. Optimizations are narrowing the gap, but it still >> remains true. > > On ppc versus PPC64, sparc vs. sparc64, and possibly other architectures > that may be true, however on x86 vs. x86_64 arch as a whole it is not > generally the case, in particular because the x86_64 arch has double the > number of available registers for gcc to play with. Also, x86_64 has a much better ABI: args get passed in registers, not on the stack. > What applications are you aware of which run slower on x86_64 than on > x86 on the same system? There used to be Java slowdowns, but this was fixed with the "compressed OOPs" option. Andrew. -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
