Cursor freezes for a split second around every 10 seconds
I've had something like this issue (with the mouse freezing momentarily every few seconds), and it was related to my second screen. If I left this second screen turned off after waking the Mac from sleep (or from having the laptop lid closed), this issue happened every time

Also had an issue with it even when the screen was on; it usually cleared after I unplugged and replugged the second screen cable.