M-Series Mac Slow/Hot Since 26.0? Try this.

[RumorConsumer]

I think it's the contactsd process. I was feeling the Mac heat up and was on a call on AirPods and looking at my phone and saw the contact photo flip a few times which it should only do if the photo is being updated in real time which it wasnt. I went and looked at Activity Monitor and lo and behold.... Contactsd was running at like 20% CPU. I know these measurements are not linear the way the intel ones were but I still don't think this is normal. CPU time is the highest of anything on my machine since reboot. That is not right.

@Joe Rossignol

 

[!!!]

I've been having problems for a number of years with contactsd CPU usage. I presume Apple broke it when they decided it was going to be another Photos app/poster editor instead of an address book.