Slow performance and large memory usage with QTableView in Qt 5.15
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@KaoN Microsoft made this change a while ago when the UWP, Windows for mobile/tablet was a thing and windows required faster reboots/boots/wakeups
As a result all modern Windows system have a "soft reboot /shutdown" these days
Usually you don't notice this, until some day, fundamental stuff starts behaving strangely.
I for once managed it (with Qt no less) to get my bluetooth driver in an undefined state, so nothing, bluetooth worked anymore, and a reboot did not fix it, because the normal reboot does not reinitialize and clear everything. That's how I learned about it.
Your case, smells like a bug hard to tell if Qt is at fault or not.
Have you tried updating your windows ? My Bluetooth story fixed itself with a windows update.And have you tried it on a 2nd, different windows pc ?
If yes, and behavior is the same (in both cases) than it may be a Qt issue
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@J-Hilk Thanks for the information. Generally I find one case that if the application run through windows remote desktop, it will slow, even it was good before, and it will not recovery until hard reboot.
But another my laptop perform badly what ever I reboot or hard shutdown.
Only 5.9 works perfectly on every situation. -
@KaoN
mmh the last Idea I have, would be updating your graphics drivers, those are most often an issue. After that, bring it to https://bugreports.qt.io
