We've hit some timing problems, so I ran some experiments using a trimmed and modified version of x01c that just plots the first graph, full size window, with plpoin but with variable numbers of points; I used code=25, circles, but I think it doesn't make much difference apart from plotting simple points. My trials with 100,000 points (in a single set of arrays) show the following approximate times for rendering the plot on the screen, in secs:
xwin 2.5 tk 3 xcairo 7.5 qtwidget 27 The tk window will resize and refresh the plot in about 2 seconds. Curiously, the qtwidget window takes 53 seconds to resize the plot, i.e., double the original time. Of course, the qtwidget preserves circles as circles on resize whereas the tk one doesn't. Plotting to files isn't so bad nor different. Here are some examples: psc 3 svg 5 pngcairo 7.5 epsqt 7.2 svgqt 7.2 pngqt 5 I looked a bit at the plpoin() code and thought at first that the problem was in the overhead to lookup and deal with all the hershey stuff point by point rather than once for all the points, but the resizing exercise suggests that the time is more likely associated with talking to the screen (although the qt driver, like the xcairo one, clearly draws off-screen and then flashes the result quickly). Is there any simple or obvious way to speed all this up for the qtwidget? Thanks Steve -- +-------------------------------------------------------------------+ Professor Steven J Schwartz Phone: +44-(0)20-7594-7660 Head, Space & Atmospheric Physics Fax: +44-(0)20-7594-7772 The Blackett Laboratory E-mail: s.schwa...@imperial.ac.uk Imperial College London Office: Huxley 6M67A London SW7 2AZ, U.K. Web: www.sp.ph.ic.ac.uk/~sjs +-------------------------------------------------------------------+ ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
