3 ms·
Did you compare x32 versus the old fashioned i386?
by qb45 11y ago
Did you compare x32 versus the old fashioned i386?
- joosters 11y agoNope, other stuff on the machine needed 64 bits so unfortunately it would be difficult to do the comparison. In theory, x32 should still be faster because the code gets to use all the other x64 features, like a larger register set and so on. I've no idea how big a difference that actually would make though.
- qb45 11y agoYou can run 32 bit binaries on 64 bit system. I bet Ubuntu has several 32 bit packages available because they are needed by Wine and and closed-source 32 bit binaries. The theoretical possibility for speedup is exactly why I asked. The x32 website has benchmarks where it's as fast as i386 and 40% faster than amd64 on pointers or as fast as amd64 and 40% faster than i386 on 64 bit math, but what's missing to really justify x32 is some "20% better than either" case.