After drilling down into the call stack, it looked like a XAML layout call (particularly WindowsInternal::ComposableShell::Experiences::Switcher::SwitchItemList::MeasureOverride) was keeping a core pegged for a substantial portion of the delay (902ms of sampled time). From there you can move it to another virtual desktop or close it. Shift + F10 - open the active window thumbnails context menu. and - navigate between window thumbnails in the opened Task View. In it I found a 1.3s message pump delay almost exactly covered by the ShowXamlTaskView event, accompanied by a flurry of CPU usage. Microsoft has assigned the following hotkeys to manage virtual desktops: Win + Tab - open Task View. There are a number of keyboard shortcuts that can help you better manage your. Out of curiosity, I tried peeking into the ETL trace captured by Feedback Hub. In the taskbar, click on the Task View button (two overlapping triangles). Task View alternates between opening immediately and lagging first when it does respond immediately, it subsequently does not animate shut (windows just snap back into place). Sometimes the issue spontaneously resolves itself, but only on every other launch - i.e. I have to wait around 500ms, occasionally upward of 1.5s, for Task View to launch. Task View should launch instantly when invoked, as it did in the pre-Timeline days. Sometimes pressing Win + Tab multiple times rapidly fixes the issue, after some impressively weird visual glitches. Search for Touchpad settings and open it. Step 1: Press Windows key+I to open Settings. by pressing Alt + F4 when Task View is open (my preferred workaround for the issue). Swiping the Touchpad with three fingers towards the top will activate Task View. It is also sufficient to force Task View's overlaid window to be recreated, e.g. When Task View is already slow, restarting explorer fixes it completely, at least for a short while. Having more than one virtual desktop open appears to make this more prominent as well. It looks like the issue only affects certain configurations of certain devices, seemingly at random - I'm experiencing it on a Surface Laptop 2 i7/8GB. Use Task View heavily for a prolonged period of time.
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