Brush lag all of a sudden

I had updated my version a couple of times recently and started having brush lag. After investigating, I came up with this answer:

No one should have to mess with the brushes themselves. That doesn't seem to be the issue. I poked around to a lot of the forum questions related to this issue. I went back to the version I last had no issues with and checked the performance settings. Many suggested turning it off & on. But, the latest update had changed the settings whereas the earlier version I went back to I noted the settings. Then went back to the latest update and made sure the settings matched.

So it seems that the latest update had turned off some of the checked items in the advanced area of the performance preferences and changed the Drawing Mode to Basic.

To check out those settings, go to Photoshop Preferences > Performance > Graphics Processor Settings: Advanced Settings >

Make sure all Advanced Settings are checked and the Advanced Drawing Mode is selected instead of Basic or Normal. In the Performance area, also make sure you are allowing Photoshop to use enough memory. Mine is set to 70%. I use Photoshop deeply so it's important for it to work properly.

What version of Photoshop are you using. If it is the current version, have you turned brush smoothing up to a high setting? That causes a small lag as it has to see which direction you move next (although on some, less powerful, systems it can cause a bigger lag)

Dave