https://bugs.kde.org/show_bug.cgi?id=460007
--- Comment #18 from Ralf Habacker <ralf.habac...@freenet.de> ---
I changed the code on the 5.1 branch to
void KHomeView::refresh()
{
Q_D(KHomeView);
if (isVisible()) {
auto t_start = std::chrono::high_resolution_clock::now();
d->loadView();
auto t_end = std::chrono::high_resolution_clock::now();
qDebug() << __FUNCTION__ << std::chrono::duration<double,
std::milli>(t_end-t_start).count() << " ms";
d->m_needsRefresh = false;
} else {
d->m_needsRefresh = true;
}
}
void KHomeView::resizeEvent(QResizeEvent* event)
{
static QTimer timeout;
static auto t_now = std::chrono::high_resolution_clock::now();
auto t_old = t_now;
t_now = std::chrono::high_resolution_clock::now();
qDebug() << __FUNCTION__ << "time to last resize event" <<
std::chrono::duration<double, std::milli>(t_now-t_old).count() << " ms";
// refresh only if no other resize event occurs within the specified time
timeout.stop();
connect(&timeout, &QTimer::timeout, this, &KHomeView::refresh,
Qt::UniqueConnection);
timeout.setSingleShot(true);
timeout.start(100);
KMyMoneyViewBase::resizeEvent(event);
}
and got with the appended testfile:
- app start (Qt5.12)
resizeEvent time to last resize event 8.1e-05 ms (initial call)
refresh 336.841 ms
refresh 185.522 ms ( triggered by other event)
resizeEvent time to last resize event 690.682 ms
refresh 305.591 ms
- moving to another screen
resizeEvent time to last resize event 53915.6 ms
refresh 172.17 ms
- resizing the window
resizeEvent time to last resize event 21941.2 ms
resizeEvent time to last resize event 35.1883 ms
resizeEvent time to last resize event 29.0735 ms
resizeEvent time to last resize event 37.9509 ms
resizeEvent time to last resize event 25.2898 ms
resizeEvent time to last resize event 31.865 ms
resizeEvent time to last resize event 24.6573 ms
resizeEvent time to last resize event 30.3148 ms
resizeEvent time to last resize event 20.7432 ms
resizeEvent time to last resize event 23.4848 ms
resizeEvent time to last resize event 19.4617 ms
resizeEvent time to last resize event 21.0152 ms
resizeEvent time to last resize event 18.9487 ms
resizeEvent time to last resize event 20.2506 ms
resizeEvent time to last resize event 20.7011 ms
resizeEvent time to last resize event 17.4308 ms
resizeEvent time to last resize event 29.7552 ms
resizeEvent time to last resize event 24.0264 ms
resizeEvent time to last resize event 16.496 ms
resizeEvent time to last resize event 16.8137 ms
resizeEvent time to last resize event 17.4071 ms
resizeEvent time to last resize event 23.0246 ms
resizeEvent time to last resize event 23.6899 ms
resizeEvent time to last resize event 16.7566 ms
resizeEvent time to last resize event 23.7812 ms
resizeEvent time to last resize event 17.9087 ms
resizeEvent time to last resize event 30.9371 ms
resizeEvent time to last resize event 13.8725 ms
resizeEvent time to last resize event 15.2983 ms
resizeEvent time to last resize event 15.8863 ms
resizeEvent time to last resize event 16.1352 ms
resizeEvent time to last resize event 15.8075 ms
resizeEvent time to last resize event 16.1257 ms
resizeEvent time to last resize event 16.1365 ms
resizeEvent time to last resize event 16.9236 ms
resizeEvent time to last resize event 23.0767 ms
resizeEvent time to last resize event 16.533 ms
resizeEvent time to last resize event 16.6189 ms
resizeEvent time to last resize event 16.8857 ms
resizeEvent time to last resize event 29.1898 ms
resizeEvent time to last resize event 16.5146 ms
resizeEvent time to last resize event 16.106 ms
resizeEvent time to last resize event 16.6079 ms
resizeEvent time to last resize event 16.2147 ms
resizeEvent time to last resize event 16.5906 ms
resizeEvent time to last resize event 16.1275 ms
resizeEvent time to last resize event 16.351 ms
resizeEvent time to last resize event 16.8019 ms
resizeEvent time to last resize event 16.6459 ms
resizeEvent time to last resize event 18.7296 ms
resizeEvent time to last resize event 18.1929 ms
resizeEvent time to last resize event 15.7177 ms
resizeEvent time to last resize event 16.428 ms
resizeEvent time to last resize event 16.1611 ms
refresh 118.69 ms
-> only one refresh
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