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MC26 intermittently causing high CPU usage on my MBP

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curtisls87:
I've only noticed this on my MBP, not on my iMac. For some reason, intermittently, the CPU usage goes up to over 200% in the Activity Monitor, when it is normally around 12%. I've attached a screen shot. I am running 26.0.94, although this happened on at least the previous version. I notice it because when it happens, the fan in the MBP kicks on. If I restart the application, it drops back to the 12% range. There doesn't seem to be any correlation with what I'm playing, as often I'm just streaming an AAC feed, or a FLAC feed. Even if I stop what's playing and play something else, it doesn't go away - I have to restart the application to go back to normal CPU usage.
The MBP is a mid-2012 Retina 2.6GHz i7 with 16 GB RAM running Catalina. The iMac that doesn't have a problem was new last year and is also running Catalina.
Any ideas would be appreciated.

dfortney:
ah yeah, syncing all your music with iCloud

curtisls87:
Thank you for responding, but I don't think so. I have close to 10 TB of music files that are served from a FreeNAS server, and only a 50GB iCloud account.

bob:
Do MC's system report and check on the percentage of thumbnails built.

curtisls87:
Here are the system reports from the MBP, the iMac 24 and the iMad 27. They all point to the same data store. The thumbnail builds are 9%, 42% and 12%, respectively. I don't have the CPU issue on either of the iMacs.

Any help is appreciated!

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