Computer is Mac Studio with 10 cores, 32 GB Memory, 2TB SSD.

Was having significant issues with any intensive I/O application. Took 3 days to install the xCode update and backups were taking days. The first full backup had been running for almost a week and the time machine estimate to completion was increasing. Spotlight indexing would take days and I had to shutdown automatic backups to get it to progress at all.

In desperation, I suspended the BOINC tasks and in a matter of minutes, the time machine estimate dropped to 2 hours, then 1 hour and completed within 5 minutes of suspending BOINC.

When I allowed BOINC to resume, I watched the Activity Monitor and saw an incredible amount of network traffic. The packets out from the boinc_master process pretty much match the packets in by the BOINC Manager and vice versa. I suspect, but lack knowledge of the various internals to be sure, that the network adaptor is being used for interprocess communication between these processes and with 10 cores this traffic saturates the i/o bus which appears to be shared between network and disk i/o and I half suspect that network traffic is given priority on the bus.

I have limited BOINC to no more than 5 tasks for now and the system is performing the way I expected. Full backups completed in hours and incremental in minutes and a subsequent xCode update installed in well under an hour.

Is my analysis reasonable? If so, might the BOINC developers consider shared memory rather than the network for interprocess communication?

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I have the same Mac Studio as yours and I don't notice any issues...weird