An attempt to run main rope code only every 8th tick: - A big win for inner loop which is O(n^2) and thus it takes 64 times less cpu now. - Look and feel is almost identical (well, to my non-pro view) - Yes, the speed is limited to 7 px per accounting tick which is potentially very bad to collisions - Ruin shoppa

#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}