Hello, On Mon, Jan 24, 2022 at 08:30:20PM -0500, a wrote: > i've installed debian 11 for both arch on same PC, amd64 seems faster > > is there some tool to demonstrate performance of PC?
Regardless of performance you should be more concerned that 32-bit x86 parts of the Linux kernel have more bugs and receive security fixes slower compared to amd64. For example, it took much longer for 32-bit x86 kernels to receive the same protections against the various speculation attacks compared to amd64, in some cases it's still not there. Then there is the fact that increasing amounts of software simply isn't available in 32-bit format. You might not have any with that restriction now, but it would surely suck to want to use some in future and not be able to without a lot of work (change your kernel at minimum). No one should be using 32-bit x86 today if they have the choice to use amd64 instead. > they say it's not possible to say which is faster without defining computing > task That is correct because there are many differences. amd64 has more registers which can make code faster, but its pointers and other data types are double the size which can affect cache hits. It really is difficult to say without real world benchmark. > is performance difference significant if computing task is web browsing Modern web browsers are quite large and the 4GiB per process memory limit with 32-bit PAE could be an issue. Otherwise, I'd guess at not much difference. Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
