Mono vs poly cpu spikes

[Xtinct]

I've noticed an odd behaviour in my new synth when loaded into Cubase (cue the collective groan) I play 1 note in "mono" (M to V number of voices 1) I get 10% average cpu and 10% realtime cpu , then I switch it to poly in this case 8 voices but still just play 1 note I get 10% average cpu but a 70% spike in realtime.
Anybody got any ideas whats going on does the M to V primitive act differently when set to 1 voice

[KG_is_back]

That is truly very weird. So if I get it right, in both cases you play just one single voice - only thing that is different is the max-voices setting on midi to voices?

[Xtinct]

I tried it with a stripped down version and now both are the same so it must be another part of the synth

[KG_is_back]

I tried it with a stripped down version and now both are the same so it must be another part of the synth

does the no of voices parameter affects other parts of the synth directly?

[Xtinct]

Only a gain reduction for poly, though some of the processing is volume dependent.

[KG_is_back]

Maybe denormals are happening somewhere.

[Xtinct]

No, no denormals had lots of fun finding and wiping them out, I'm starting not to trust Cubase's new meter because if I load enough instances I can get the real time indicator to constantly hover between 90 and 100% while the average never goes above 20%.
Probably just a small bug or still SM unfriendly but 7 is worth it for the EQ alone.