On Mon, 2009-03-09 at 12:49 -0700, Adam Williamson wrote: > On Mon, 2009-03-09 at 12:41 -0600, Petrus de Calguarium wrote: > > > As memory requirements for 64-bit are anywhere from 50-100% greater and > > the only appreciable difference is a "psychological" performance boost, what > > REAL benefit is there, actually? > > It's not psychological, it's just not noticeable in most regular > operations. Actually, most people wouldn't notice if you replaced their > CPU with one which was twice as fast (or, as the BOFH knows, half as > fast...), most of the time, because very few of the operations most > people do day-to-day are remotely CPU-bound. A few years ago I was > running a 2.4GHz (Pentium 4-era) Celeron as my desktop. The CPU fan gave > out, so the CPU throttled itself down to 800MHz and kept running. I > didn't notice for a fortnight. > > The most common CPU-bound operation in our world, I guess, is > compilation, and you would notice a definite improvement in speed there, > running x86-64 vs x86-32 - not huge, but noticeable. Certain database > and I think scientific operations that are CPU-bound also derive a > significant benefit. It depends on whether the code can take advantage > of much bigger registers, AIUI. Anyone who does even casual video processing (e.g. with transcode filters) definitely will notice. This is something that pegs both cores to 100% when I run it, until the fan kicks in and it slows a bit. poc -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
