On Feb 4, 2008 2:36 AM, Erik de Castro Lopo <mle+la@xxxxxxxxxxxxx> wrote: > david wrote: > > > Just curious, but I've heard that 64-bit OSes are slower than 32-bit > > ones. That seems odd to me. Any truth to it? > > Swings and roundabouts. > > On architectures like Sparc where the 32 and 64 bit CPUs have the same > number of registers, the 64 bit OS is likely to be a little slower > on operatrions like traversing linked lists because each pointer is > twice as big on 64 bit and hence each retrieval of a pointer requires > twice as much memory bandwidth as the 32 bit OS. > Right. I presumed that he was comparing a 32 to a 64 bit OS on the same (64 bit) hardware, in which case I would not expect a difference; it's just as fast to load a 32 bit pointer as a 64 bit one. Unless the compiler is smart enough to fetch two 32 bit words at once whenever possible ;-) Lee _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
