On 2007-01-27 10:24-0500 Mark Wilson wrote: > > Hello, > > We need to update a graph at about a 5Hz rate, and the > plplot canvas doesn't seem able to keep up with that > (takes 200 to 300 ms to update graph). I'm wondering if > this is something to be expected, or if we're doing > something wrong (I don't expect anyone to tell me what I > may or may not be doing wrong, I'm just looking for > general info on performance).
What computer language interface and PLplot device are you using? If you need efficiency, then use the C interface directly. Some of our other compiled interfaces (f77, f95, C++, Java) are pretty efficient as well, but our scripting language interfaces (Python/Numeric, Perl/PDL, Tcl), although great for quick prototyping, are noticeably slower if that is a concern as in your case. Also, your efficiency will depend on which device you are using. Some (e.g., -dev psc) are extremely fast because they do not depend on any external libraries, while others are slower (e.g., -dev psttfc) because they use external libraries to produce really nice looking results which takes extra time. Also, you mentioned a canvas which I believe narrows down the device you are currently using to one of the GUI device choices such as -dev tk, -dev wxwidgets, or -dev gcw. Such interactive GUI devices are much slower in general than file devices. Do you need that GUI capability? If all you are doing is making a movie with no interaction by the user, than I have heard of one PLplot application (I cannot recall the details) that combined -dev gif (or possibly -dev jpeg?) results together to make a movie. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Plplot-general mailing list Plplot-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-general
