Noob question here, eleuthria, but enabling NMC mining does not subtract from my BTC earnings, does it?

NMC merged mining does not impact BTC earnings.
Thanks for the rapid response, Eleuthria!

I should have been more explicit, it doesn't subtract computational resource from my BTC mining? Just want to make sure I'm not wasting h/s!
The only thing merged mining adds is a couple bytes of data to the coinbase. You won't be losing any hash rate as a result, and the bandwidth increase is (probably) under 1 meg (downsteram) a day.