I will wake my mac up from sleep. I enter the password and push enter; it takes 10 seconds to unlock. All actions are delayed; a chrome tab will show blank before rendering the page. Clicking on the apple to
Restart... shows the pinwheel (before completing and allowing me to restart).
All actions (e.g. running git in a terminal window) are paused before executing. The CPU isn't running high. I don't see anything strange apart from the pauses. After restarting things are OK again.
This happens infrequently, though it has been going on for at least a year.
I'm running currently 10.14.6 (18G95).
The machine is a MacBook Pro (Retina, 15-inch, Mid 2015). Disk is SSD.