Comment 149 for bug 1690719

I'm quite severely affected by this. Opening the app grid freezes the cursor for 1-2s and even switching applications causes a noticeable freeze.

Why is even mouse input processed on the main thread? Can't Mutter spin up another thread that processes mouse inputs, updates the cursor and the asynchronously sends the events to the main thread for other things? Is there ever a reason that one would like to block cursor updates, and is so, can't the main thread tell the input thread to check with it first only in those circumstances?