Re: Stealing ur megahurts (no, really)

Dr. David Alan Gilbert
2006-05-19T17:37:32Z

* John Richard Moser (nigelenki@comcast.net) wrote:
> That I wrote
> > <...>
> >
> > Hi John,
> > While cpu downclocking helps a bit, it would be hopelessly inaccurate
> > for figuring out if your app would run fast enough on the given
> > ancient machine. A lot else has happened to the world since the days
> > of the 200MHz CPU:
> > * Faster memory
> > * Larger caches
> > * Faster PCI busses
> > * Instruction set additions (various more levels of SSE etc)
> > * Faster discs
> > * Changes to the CPU architecture/implementation
> >
>
> Skews and fuzz. Imperfections, but at least we get a general idea. ;)

Really? I bet there is a factor of 2 at least in that lot when you
put them together? (Depending on what you are running)
Remember the reason you are scrabbling around for this ancient machine
is to answer a question along the lines of 'is my program useable on a
.....' ?
Also you want to make sure you haven't made an assumption about an actual
feature (you left a cmov in somewhere? You assumed AGP? LBA block addressing
etc).

Dave
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