Stan Hoeppner <s...@hardwarefreak.com> writes: > Given the recent threads regarding 32 vs 64 bit I thought I'd take a > moment to present information often omitted in responses to these posts. > > [ some good explanations ]
Another often underestimated bit is the new addressing mode relative to the instruction pointer %rip. This greatly reduces the performance overhead of position independent code needed for shared libs. On the other hand, the penalties that come with 64 bit are also often underestimated: Pointers are 64 bit wide and this can increase memory foot print considerably. Argueing with decreasing costs for main memory neglects the fact that even this larger memory must be inited/loaded from disk, transferred to/from CPU thru the memory bus and pointers also require more space in CPU cache memory which cannot easily be enlarged. Nevertheless, I always prefer the amd64 installation instead of i386 when installing on new machines. urs -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/ygfmwu26fmd....@janus.isnogud.escape.de
