在macOS 11 Big Sur中启用透明度之后，Mission Control变得非常卡顿

[RiverKy]

It's very sluggish to open Mission Control with Vibrancy on a macOS 11 device.

如题，在一台安装了macOS 11的设备上，Vibrancy能正常工作，但是当进入Mission Control的时候将非常卡顿。 As what the title says, Vibrancy works fine, but it's very sluggish to open Mission Control with Vibrancy on a macOS 11 device.

[l1997i]

That's true.

[Drun555]

+1. Didn't test on previous macOS, but in 11 it is definitely performs very poorly.

[EYHN]

I don't know why, but it is true. It seems to be a problem of macos itself, I don't know how to solve it

[AurevoirXavier]

~~Since fixed in macOS 11.2.1~~

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Oh no still exist, but much better now

[lor1x]

+1. Didn't test on previous macOS, but in 11 it is definitely performs very poorly.

It has been present for over a year now, since when I had Catalina and has not yet been fixed in Big Sur and it seems we might have to wait a while for a fix

[cpuccino]

One thing I noticed is, focusing on something else (desktop or another window) before swiping up to trigger mission control seems to fix the lag. It also resolves an issue where the acrylic turns grey when hovering over the mission control panel.

I'm not too familiar with macOS' APIs so I'm not too sure if this is actually possible, but if we can change the focus to the desktop or another window before mission control gets triggered, it could be a possible fix/hotfix. (Again, not sure if we can add hooks to that event, or if that event even gets broadcasted)