Sun 02 Nov 2008 01:01:23 PM UTC, original submission:
In 0.6.1, both the variable view and data view lag a lot when scrolling. Actually, you can scroll, let go of the touchpad scrollbar, and look at pspp keep scrolling for 10 seconds or so :) this is not the case with, say, gnumeric (or even OOo Calc).
If this happens on a small dataset (575 variables, 8 cases), I'm worried about what kind of performance problems would appear with large ones.
My non-developer guess is that the pspp gui must be doing unnecessary work, like repainting all the rows/columns on each scroll step, or something along those lines. At least, when I scroll, I noticed that it seems to scroll one line at a time, and things "flicker" (such as the column/row headers).
Maybe this could be profiled using sysprof/systat, but I lack the knowledge/skill to do that.
Some interesting profiling reference material, if you haven't seen them already:
http://ftp.belnet.be/mirrors/FOSDEM/2007/FOSDEM2007-ProfilingDesktopApplication.ogg
http://www.gnome.org/~federico/docs/2005-GNOME-Summit/html/index.html
http://www.gnome.org/~federico/docs/2006-GUADEC/how-much-faster/index.html
|