On the Windows machine I spent the past year using for work, I absolutely massive (many seconds, and I could induce it to as many seconds as desired, even for minutes) input lag when moving windows around that required me to kill DWM.exe every single day, sometimes multiple times a day.
I didn't permanently kill it like in the article, though. Just killed the process and let it restart.
I don't know for sure that dwm.exe itself was the cause. It could have been an issue with some of the endpoint management crap my employer forces on users, somehow, or maybe MS PowerToys (though I think I eventually ruled that out at some point). But killing dwm.exe fixes it.
Office 2019 did this for me on my work laptop. Just grab any MS Office window with the mouse, describe a full circle or two, then sit back and watch as the laptop's CPU melts through the floor while the Office window slowly crawls over the screen for the next minute or two.
IIRC that’s not composition’s fault but some application window delaying message posting with a poorly-done global hook. That’s also the cause for your mouse freezing for half a second then appearing where it should’ve been.
Maybe DWM restarting also kills and reinitializes the window messages mechanism?
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On the Windows machine I spent the past year using for work, I absolutely massive (many seconds, and I could induce it to as many seconds as desired, even for minutes) input lag when moving windows around that required me to kill DWM.exe every single day, sometimes multiple times a day.
I didn't permanently kill it like in the article, though. Just killed the process and let it restart.
I don't know for sure that dwm.exe itself was the cause. It could have been an issue with some of the endpoint management crap my employer forces on users, somehow, or maybe MS PowerToys (though I think I eventually ruled that out at some point). But killing dwm.exe fixes it.
Office 2019 did this for me on my work laptop. Just grab any MS Office window with the mouse, describe a full circle or two, then sit back and watch as the laptop's CPU melts through the floor while the Office window slowly crawls over the screen for the next minute or two.
That's the one! The bug seems to be several years old now.
I gotta say coming back to Windows for a while was a real shock for me. I can't believe how much basic stuff was more or less broken.
IIRC that’s not composition’s fault but some application window delaying message posting with a poorly-done global hook. That’s also the cause for your mouse freezing for half a second then appearing where it should’ve been.
Maybe DWM restarting also kills and reinitializes the window messages mechanism?