| Re: IDL 5.4 and MacOS 9.1 [message #25327 is a reply to message #25291] |
Thu, 07 June 2001 08:50   |
Pavel A. Romashkin
Messages: 531
Registered: November 2000
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Senior Member |
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Hi Dominik,
> Maybe you are right. The SCSI drive is a external (5 or 10 MB per sec ?) in
> an older G3 (but not an upgraded) with an SCSI port still directly on the
> board. There is no network connection at all. Hope you know which one I
> mean, this beige G3 with 233MHz. There is no network connection at all. On
> the weekend I will format the external drive and/or reinstal my system.
I know the machine you are talking about, we have one here. My colleague
uses it as a shelf for a G4 Titanium laptop now, after the upgrades.
Even the internal data bus on that one is slow compared to G4s. I would
guess that revamping the external drive is not going to improve it a
lot, and suggest that you use the internal drive. Although on my pre-G3
PowerComputing clone I have at home IDL started still faster than on
yours, using a 20 Mb/s SCSI bus. So I'd blame a slow, fragmented drive.
> So, another thing we observed is, that a big calculation a P3 with 900Mhz
> and 512MB took 42 secs, while on a Mac the same calculating only took 22
> secs. Does somebody have experience in performance comparison Mac<->PC ???
RSI said that Macs are the fastest to run IDL. I assume that pertains to
G4s, where IDL takes advantage of the Motorola's chip. My guess here
would be that G3 chip is a little more efficient than a P3 (while more
expensive), and the system bus is faster. Does P3 have a 33 MHz bus? You
can get some idea if you run IDL's timetests on both and look at which
tests are slower on a Pentium. I'd bet those would be disk access tests.
I want to try IDL on my home PC w/Duron 750, but need toget a CD from RSI.
Cheers,
Pavel
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