There is very severe lag when moving the cursor over the Minecraft window with a high refresh rate mouse. I'm not sure what mice it affects or if it is limited to Logitech's, but my Logitech G700S causes severe problems when it's refresh rate is above 250Hz. Even if I am in the escape menu and the game is completely paused, I can see the FPS counter drop significantly when moving the cursor over the window. I have seen some complaints about this issue with varying mice, but I can't verify them myself.
Here are videos of the issue on varying versions of the game, and modded as well as vanilla to demonstrate that this is an issue across all of Minecraft.
Vanilla 17w50a: https://youtu.be/oHXgVmU7dCM
Vanilla 1.12.2: https://youtu.be/3KNje5eSVfA
Modded 1.10.2: https://youtu.be/9aZxZrFEcOw
I have a relatively powerful computer, but even it can't handle the high refresh rate mouse. Especially with a polling rate of 1000Hz, the game often completely locks up upon moving the cursor.
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Sorry, I'm still trying to get the issue to happen again. It is on and off every couple weeks. I'll have the problem for a month or so, then it's just gone for the next 2 weeks, and it suddenly comes back. It's somewhat there still, but just not very severe. There is nothing unusual in the logs, but from what I can see, the display_update thread's usage rises a lot, from about 3 to 12% after moving my mouse around a lot.
Could you please press
SHIFT+F3to show the debug pie graph and then look at the log if any warnings are logged when you experience this lag. If so copy and paste them here please.