On Thu, Nov 09, 2000 at 02:07:14PM +0100, Laursen,Jacob Lykkeberg XJT wrote:
>
> >> At which frequency is the CPU in Palm Vx clocked?
>
> > Please see:
> >
> > <http://www.palmos.com/dev/tech/hardware/compare.html>
> >
> > But why would you want to know???
>
> Thanks! Do make a comparison in a report - and to argument that
> optimization is an important design criteria because of the slow CPU. But
> it's actually nice to know that Palm Vx is faster than Amiga 1200, when
> comparing raw CPU speed. ;-)
Also note that optimization depends a lot on the processor. On a RISC
machine you often can't beat the compiler. The 68K architecture is
about in the middle - I hand-optimize the critical loops with an
instruction cycle chart. On an X86 I was often able to do a lot to
speed things, but I haven't tried recently. Also clock speed is not a
direct indicator. The PowerPC Macs have more power at slower clock
rates as do DEC Alpha processors. Something like comparing Diesel
v.s. Gas engines on the basis of RPM.
And some optimization is simply writing good C code. FlashPro and
Launcher take a long time to compose the sorted lists to act on apps
(10-20 seconds on my V), but my ZBoxZ takes less than a second. I'm
not doing anything wierd, but I don't grab extra data and create a
really efficient record for the system QSort routine.
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