Optimizing Mac Studio with Rosetta in Cubase

Mac Studio M1 Max
32 mb
Apollo twin
buffer size 64

Not using UAD plugs yet.
I have very little loaded in my Daw and my performance meter is jumping around like I’m running an old machine.
I need to use Rosetta. My research has told me that Rosetta should not impact performance that much. But with a couple of plugs this should not be happening.
Is there something I need to do to optimize?

I want to have a low buffer size for tracking with amp sims.
I’ve seen demos of 100+ tracks with a couple of plugs on each track with a buffer of 32 and no glitching - but this was not Cubase.

Activity monitor show no spikes so my issue is in Cubase.

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