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Article #307Re: Why is GnuPlot for PM slow?
From: Roger Fearick
Date: Sat, 08 Aug 1992 16:07
Date: Sat, 08 Aug 1992 16:07
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1758 bytes
In article <gyan.713130305@unixg.ubc.ca> gyan@unixg.ubc.ca (Gyan P. Sinha) writes: > I wonder whether other people have also found GnuPlot for PM >to be much slower than the DOS version. Its a great port, and I can >finally throw big data sets at it, but the speed of the thing has me >puzzled. I notice that that the same 3-d plots in the DOS version seem >to be at least a couple of time faster. The puzzling thing is that its >not the display itself that seems to be taking the time, but the >underlying calculations themselves, as the cpu load jumps to 100% >while the drawing window is blank, and then as soon as the plot is >displayed, the pulse graph goes back to normal. > Any comments, speculation would be welcome. >Gyan P. Sinha I suspect its the translation in the driver which pipes commands to the PM window that does it. The DOS version is writing directly to the hardware. It would be a lot more efficient with pure binary data piped between the driver and the window, but the current scheme is simple and it works. Maybe when I have some time I'll tune it up a bit .... Roger. Roger Fearick * Internet: fearick@physci.uct.ac.za Dept. of Physics * University of Cape Town *
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Newsgroups: comp.os.os2.programmer Path: arc1-ca.pugleaf.net!sparky!uunet!psgrain!ee.und.ac.za!ucthpx!physci.uct.ac.za!fearick From: fearick@physci.uct.ac.za (Roger Fearick) Subject: Re: Why is GnuPlot for PM slow? Sender: news@ucthpx.uct.ac.za (UCT News Admin.) Message-ID: <fearick.48.713290068@physci.uct.ac.za> Date: Sat, 8 Aug 1992 16:07:48 GMT References: <gyan.713130305@unixg.ubc.ca> Organization: Physics Department, University of Cape Town Keywords: GnuPlot, PM Lines: 30