On Fri, 23 Sep 2011, Michael Klein wrote: > Attached is also a simple implementation of the Douglas-Peucker algorithm in > Lua. Filtering a track with 3000 points takes only a few seconds on my dated > G4 Powerbook, and it seems most of the time is actually spent in > track.rebuild() *after* the Lua work. So performance is IMHO no showstopper.
the reason for track.rebuild() being rather slow is actually a Qt/Mac deficiency, where QDateTime::toString(Qt::TextDate) if rather expensive. I filed a bug: https://bugreports.qt.nokia.com/browse/QTBUG-21678 -- Michael fjelljo.puffin.lb.shuttle.de:~ > uptime 23:27 up 3 days, 4:17, 4 users, load averages: 0.79 1.25 0.89 ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Qlandkartegt-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/qlandkartegt-users
